With the release of the Endless Ragnarok expansion for Granblue Fantasy: Relink on July 9, 2026, Cygames introduced high-stakes Chaos-difficulty quests that demand flawless multiplayer coordination. A major pillar of this end-game loop is the newly integrated Summon System, which allows Lyria to manifest powerful primal beasts to turn the tide of battle. However, players cannot simply spam these entities at will. Understanding the official Endless Ragnarok summon rules in co op is essential if your party hopes to survive encounters against Beelzebub or The World. Failing to coordinate your summon timers will result in wasted resources, interrupted animations, and ultimately, a party wipe.
To optimize your team's DPS and utility, you must master the specific mechanics governing how multiple players interact with the summon queue. The Endless Ragnarok summon rules in co op dictate not only who can summon at any given moment, but also how summon gauges build, how costs decrease when chained, and how controllable summons like Lucilius and Rolan alter the battlefield layout. This guide breaks down these rules, complete with data tables and tactical advice for high-level play.
The Core Mechanics of Multiplayer Summoning
In Chaos-difficulty quests and Fatebreaker quests, each of the four players can equip up to 4 passive summons in their loadout. However, only one player can actively field a summon at any given moment. This restriction is known as the Endless Ragnarok one summon at a time co op rule. If Player A summons Bahamut, Player B's summon prompt will be greyed out until Bahamut's active phase ends or is prematurely dismissed.
Furthermore, the Endless Ragnarok summon per player co op limit restricts each individual to a specific Summon Action Point (SAP) pool. You cannot summon back-to-back without regenerating your summon gauge via dealing damage, executing Link Attacks, or triggering SBA (Skybound Arts).
To initiate a summon, a player must fill their individual Summon Gauge to 100%. Once filled, pressing the designated summon shortcut (L3 + R3 by default on PS5 and Switch 2) triggers Lyria's summoning animation. During this brief 1.5-second animation, the summoning player is invulnerable, but they cannot move or attack.
| Summon Name | Base SAP Cost | Active Duration (Seconds) | Cooldown (Seconds) | Primary Active Effect |
|---|---|---|---|---|
| Bahamut | 100 | 12 | 180 | Deals massive AoE Light/Dark damage; applies Def Down (20%) |
| Lucilius (Controllable) | 150 | 20 | 240 | Player controls Lucilius; high-frequency sword waves; inflicts Slow |
| Rolan (Controllable) | 150 | 20 | 240 | Player controls Rolan; provides party-wide barrier and attack buffs |
| Tiamat Omega | 80 | 8 | 120 | Creates a wind vortex that pulls in trash mobs; grants Mirror Image (3 hits) |
| Colossus Omega | 90 | 10 | 140 | Slams the ground dealing fire damage; grants party-wide Defense Up (30%) |
Managing these cooldowns requires open communication. If your team is running a high-difficulty Fatebreaker quest, designating a "Summon Shotcaller" ensures that utility summons like Colossus Omega are not wasted during transition phases where the boss is invulnerable.
The Subsequent Summon Discount Mechanic
While the restriction of having only one active summon at a time might seem limiting, Cygames designed a mechanic to encourage rapid, sequential summoning. Under the rule that Endless Ragnarok subsequent summons cost less, triggering a summon immediately after another player's summon finishes grants a significant SAP discount to the next player in the queue.
This discount window is brief—lasting exactly 5 seconds after the previous summon exits the field. If a teammate initiates their summon within this 5-second "Resonance Window," their SAP cost is reduced. If a third and fourth player follow up in rapid succession, the discount scales even higher, allowing for devastating summon chains.
| Chain Tier | Resonance Window (Seconds) | SAP Cost Reduction (%) | Bonus Effect |
|---|---|---|---|
| Chain 1 (Initiator) | N/A (Base Summon) | 0% | None |
| Chain 2 (Follow-up) | 5.0 | 20% | Extends active summon duration by 2 seconds |
| Chain 3 (Follow-up) | 5.0 | 35% | Boosts summon skill damage by 15% |
| Chain 4 (Cap Stone) | 5.0 | 50% | Instantly recovers 10% SBA gauge for the entire party |
To execute this strategy successfully in co-op, players must watch the active summon's duration bar located just below the boss's health bar. As the bar approaches zero, the next player in the rotation should prepare to input their summon command. This is particularly useful when attempting to break the shield of bosses like Ragnalia, where sustained elemental pressure is required.
For more details on building your characters to survive these high-end encounters, check out our comprehensive Sigil Tier List.
Controllable Summons: Playing as Lucilius and Rolan
Unlike standard passive summons that perform a single strike and depart, Lucilius and Rolan are fully controllable units. When a player summons either of these legendary figures, their character is temporarily replaced on the field. The summoner gains direct control of the primal beast, utilizing a unique set of high-damage skills and defensive maneuvers.
During this time, the other three players must protect the summoner's physical body, which remains vulnerable in a meditative state unless protected by support characters like Maglielle (who can deploy shields and flying weapons) or Vane (with his Rampart shield).
[Player Summons Lucilius/Rolan]
│
├─► Summoner's Body: Vulnerable (Requires protection from teammates)
│
└─► Summon Control: Active (20-second duration)
├─► Basic Attacks: Projectile waves / Sweep attacks
├─► Skill 1: High-damage AoE (Cooldown-based)
└─► Ultimate: Triggers Primal Burst & dismisses summon early
Controllable summons alter the flow of combat significantly. While controlling Lucilius, the player can spam lightstep sword waves similar to Sandalphon in Supreme Primarch Mode. This makes Lucilius an SS-tier summon choice for pure DPS phases. Rolan, on the other hand, is best deployed during intense boss overdrive phases, as his defensive barriers can absorb one-hit kill mechanics from bosses like Beelzebub.
| Controllable Summon | Basic Attack Style | Skill 1 (Cooldown) | Skill 2 (Cooldown) | Ultimate Skill |
|---|---|---|---|---|
| Lucilius | Lightstep sword waves (AoE) | Paradise Lost (8s): Massive holy impact | Phosphorus (12s): Blinds and slows targets | Tears of the Apocalypse: Huge burst; ends summon |
| Rolan | Swift rapier thrusts | Sacred Shield (10s): Party-wide 5000 HP barrier | Lex Talionis (15s): Taunts boss; increases counter damage | Glinting Blade: Multi-hit slash; ends summon |
Link Time Coordination and Primal Burst Execution
Maximizing your damage output in Chaos-difficulty quests requires aligning your summon windows with Link Time. The Endless Ragnarok co op link attack timing is critical here. When the Link Gauge reaches 100% and all players perform a coordinated Link Attack, the party enters Link Time. During Link Time, skill cooldowns are drastically reduced, and summon gauge generation is accelerated by 200%.
The ultimate objective during Link Time is to trigger a Primal Burst. This is achieved when all four party members execute their Skybound Arts (SBA) in sequence while a summon is active on the field.
Step-by-Step Primal Burst Strategy:
- Build the Link Gauge: Use multi-hit characters like Beatrix or Lancelot to quickly build the Link Gauge to 100%.
- Trigger Link Time: Coordinate the final Link Attack. Ensure all players are in position.
- Initiate the Summon: The designated initiator summons Bahamut or Lucilius.
- Execute SBA Chain: Player 1 activates their SBA immediately. This freezes the boss's action frame.
- Chain SBAs: Players 2, 3, and 4 chain their SBAs sequentially (Full Chain).
- Primal Burst Trigger: Upon completion of the Full Chain, the active summon absorbs the elemental energy, executing a Primal Burst that deals massive, non-elemental damage and inflicts a 10-second Slow status on the boss.
| Active Summon | Primal Burst Name | Base Damage Multiplier | Status Inflicted |
|---|---|---|---|
| Lucilius | Final Paradise Lost | 12.5x | Slow (10 seconds), Defense Down (30%) |
| Rolan | Eternal Sanctuary | 10.0x | Attack Up (50% to party), Invincibility (5 seconds) |
| Bahamut | Supernova Ragnarok | 11.0x | Burn (Ticks for 50k/sec), SBA Gauge Regen Up |
| Omega Summons | Elemental Cataclysm | 8.5x | Elemental Vulnerability (15%) |
To master the timing required for these high-level maneuvers, consult the official Granblue Fantasy: Relink Co-op Guide on Steam for patch notes and connection troubleshooting.
Build Integration: Sigils and Passive Summon Bonuses
To make the most of the multiplayer summon rules, players must optimize their loadouts. Equipping S-tier Sigils such as Warpath+, War Elemental+, and character-specific Sigils is standard, but the expansion also introduces Sigils that directly interact with the summon gauge.
For example, characters like Sandalphon or Beatrix (utilizing her Delta Clock mechanic) can run specialized "Summoner's Insight" Sigils to increase the rate at which they generate SAP. Furthermore, Weapon Transcendence—which allows players to upgrade Defender, Ascension, Executioner, Stinger, Stunner, or Terminus weapons beyond their standard limits—unlocks swappable traits in Slots II and IV. Some of these traits reduce the cooldown of the Resonance Window or increase the duration of controllable summons.
Recommended Summon-Focused Sigils:
- Summoner's Insight V+: Increases SAP generation rate by 15%. (A-tier)
- Resonance Master V+: Extends the Resonance Window for subsequent summons from 5 seconds to 8 seconds. (S-tier)
- Tactical Pact V+: Increases the damage of controllable summons (Lucilius/Rolan) by 25%. (S-tier)
By coordinating your team's Sigils, you can ensure that your party always has a summon ready for critical boss phases, maximizing your DPS while minimizing downtime.
FAQ: Multiplayer Summoning in Endless Ragnarok
Can two players summon Lucilius at the same time?
No. Under the Endless Ragnarok one summon at a time co op rule, only one summon can be active on the field at any given time. If one player has summoned Lucilius, all other players' summon prompts will be locked until Lucilius's duration expires or his ultimate skill is triggered.
Does the subsequent summon discount apply if the previous summon was interrupted?
Yes. As long as the active summon's duration bar empties or is completed via an ultimate skill, the 5-second Resonance Window will trigger. However, if the summoning player is knocked out before the summon animation completes, the summon is canceled, no discount is applied, and the SAP is refunded to the player.
Can I summon during a boss's overdrive phase?
Yes, you can summon during overdrive. In fact, summoning Rolan during Beelzebub's or The World's overdrive phases is a highly recommended strategy, as Rolan's defensive barriers can protect the party from devastating arena-wide attacks.
How do Master Traits affect summon mechanics?
Master Traits (Insight, Essence, and Crux paths unlocked at Level 100) provide passive boosts to your character's stats, but certain nodes also enhance summon performance. For example, the Insight path for support characters like Maglielle increases the active duration of summoned beasts by up to 10%, while the Crux path for DPS characters like Beatrix increases the damage dealt during a Primal Burst.