Lost Sword Yeti Raid Guide: F2P Team Setup and Boss Strategy

To defeat the Yeti Raid boss in Lost Sword using a free-to-play roster, field a balanced four-unit squad with single-target elemental damage, multi-hit shield shredding, dedicated tanking, and sustain. Success requires saving your high-damage ultimate abilities for the boss's stagger window rather than firing them into its active ice barrier.

Recommended F2P Team Composition

The encounter requires surviving steady cleaves and arena-wide frost slams while meeting a strict stagger threshold. Use the following role distribution to build an accessible team:

Role	Recommended Unit	Primary Function	Viable Substitutes
Main DPS	Flame Emperor	Exploits elemental weakness; bursts during stagger	High single-target physical carry
Breaker / Sub-DPS	Astaroth or Erin	Depletes the break gauge with rapid multi-hit attacks	High-frequency melee attacker
Tank	Bedivere or Tristan	Holds aggro, absorbs cleave, and faces boss away	High-defense knight with self-shields
Healer / Support	Dianne or Lueria	Restores party HP, cleanses chill, and grants barriers	Dedicated AoE sustain healer

Fire-element damage dealers are preferred because they exploit the Yeti's ice typing. Your secondary attacker must prioritize hit count over raw burst damage to deplete the boss's break bar quickly. For defense, your frontline tank must maintain aggro and face the Yeti toward the arena edge so regular cleave attacks do not reach backline supports.

Yeti Boss Mechanics

The Yeti encounter revolves around surviving frost attacks and managing the stagger gauge:

Cleave Attacks: Standard melee strikes that hit a frontal cone. Keep the Yeti aimed away from your supports to isolate this damage to your tank.
Ground Slam: An arena-wide attack preceded by a visible warning circle. It deals physical and frost damage while applying chill debuffs that lower party attack speed and movement speed.
Ice Shield and Break Bar: Following major attacks, the Yeti activates an icy shield with massive damage resistance. You must deplete its break gauge quickly; failing to break the bar triggers a secondary unmitigated slam that can wipe your squishier supports.
Stagger State: Once the break bar is completely depleted, the Yeti is temporarily incapacitated. Its attack casts are interrupted, and incoming damage is amplified.

Skill Rotation and Timing Sequence

Do not leave ultimate abilities on full auto. Firing damage ultimates while the Yeti’s ice barrier is active wastes your highest damage multipliers. Follow this manual rotation instead:

Opening Phase: Let your tank establish position and aggro along the edge of the arena. Use basic skills and auto-attacks to build ultimate energy.
Shield Cast Trigger: As soon as the Yeti raises its ice shield, deploy your breaker’s multi-hit skills (such as Astaroth or Erin) to shred the break bar. Hold your main DPS ultimate.
Stagger Burst Window: When the break bar empties and the Yeti falls to one knee, immediately activate your main carry's ultimate, offensive pet skills, and remaining damage cooldowns to capitalize on amplified damage.
Defensive Reset: As the stagger state ends, trigger party shields and group heals with Dianne or Lueria. Stabilize party health before the next ground slam sequence begins.

Gear and Pet Priorities

Surviving long enough to beat the enrage timer requires targeted stat investments across your roster:

Main DPS: Prioritize Critical Rate, Attack Percentage, and Skill Damage. Upgrade your weapon to the highest available tier threshold to clear the DPS check.
Tank and Healer: Prioritize Maximum HP%, Defense, and Damage Reduction. Ranged supports need sufficient baseline defense to endure the arena-wide frost slams.
Pets: Equip pets that provide passive team attack buffs if you easily survive slams. If your supports die during mid-fight AoE phases, equip a defensive pet that grants bonus maximum HP or automated survival barriers.