The Seven Deadly Sins: Giant Sisters 4-Turn Boss Guide

To clear the Ragnarok Giant Sisters event boss battle in The Seven Deadly Sins within four turns, you must defeat both Galga and Greive simultaneously across two consecutive two-turn phases. Eliminating one sister while leaving the other alive triggers heavy defensive buffs or enraged attack multipliers, making balanced area-of-effect damage and coordinated single-target finishes essential for meeting the Turn 4 clear window.

Boss Mechanics and Target Priority

The battle features Galga and Greive across two phases:

• Simultaneous Defeat: If one sister dies early, the surviving sister gains massive defensive buffs or attack multipliers that will wipe your front line on Turn 5. Both sisters must be brought down together in Phase 1 on Turn 2, and in Phase 2 on Turn 4.
• Galga: Delivers heavy physical cleave attacks that threaten your team's survivability if the fight drags on.
• Greive: Deploys barriers, protective shields, and disruption debuffs to stall your damage output.

Lower both bosses evenly with area-of-effect attacks before spending single-target skills to finish them off in the same turn.

Recommended 4-Turn Team Setup

A reliable four-turn clear requires a skill rank-up support unit to upgrade offensive cards immediately, alongside two high-damage burst carries and a stat-boosting backline sub unit.

4-Turn Skill Order and Phase Execution

Phase 1: Turns 1 and 2

1. Turn 1: Cast Gowther's rank-up skill (Invasion Arrow) to elevate your team's cards to silver rank. Follow with an upgraded AoE attack from your primary carry to weaken both Galga and Greive evenly. Use your third action to play a filler card or cycle skills. Do not spend maximum-multiplier burst cards on this turn.
2. Turn 2: Open with a high-rank AoE attack to strip Greive's protective effects and reduce both bosses below roughly 30% health. Use your remaining two actions on targeted burst attacks—one directed at Galga and one at Greive—to defeat both bosses in the same turn.

Phase 2: Turns 3 and 4

1. Turn 3: Galga and Greive revive with higher base stats and defensive shields or stances. Use your attacks to break shields, cycle cards, or merge cards naturally into gold rank. If available, use a second rank-up skill to prepare top-tier damage cards for the next turn.
2. Turn 4: Unleash accumulated Ultimate Moves and gold-tier attack skills. Lead with your hardest-hitting AoE Ultimate (such as Thor or LR Escanor) to bypass their shared base defenses. Spend your remaining actions on single-target skills to wipe out any remaining health on either sister before their Turn 5 enrage triggers.

Farming Tips and Exchange Shop Priorities

• Food Selection: Use Attack Food if your team falls short of the damage thresholds needed to secure Turn 2 or Turn 4 kills. Switch to Coin or Gold food only when your team consistently clears without RNG failure.
• Difficulty Level: Farm Hell difficulty only if your team achieves the four-turn rhythm reliably. If bad card draws cause frequent wipes, farm the highest difficulty you can clear without failure.
• Exchange Priorities: Clear high-value limited rewards first, focusing on UR Evolution Pendants, Super Awakening Coins, and event-exclusive cosmetic materials before purchasing standard enhancement potions.