How to Beat Act 1 Boss: Frostbound Sentinel

Defeat the Summer Nightmare Act 1 Boss, Frostbound Sentinel. Learn its Glacial Breath and Ice Shard attacks and how to counter its freezing abilities.

The Frostbound Sentinel is a large, ice-elemental boss encountered during Rean's Act 1 route. This boss poses a significant threat with its ice-based attacks and ability to inflict Freeze.

Phases:

• Phase 1 (100%-60% HP): The Sentinel uses 'Glacial Breath' (AoE ice damage) and 'Ice Shard' (single-target ice damage, chance to inflict Freeze).
• Phase 2 (Under 60% HP): The Sentinel will summon two 'Ice Golems' as reinforcements. It will also gain a temporary DEF buff and start using 'Absolute Zero', a powerful AoE ice attack that can inflict widespread Freeze.

Weaknesses:

• Elemental Weakness: Fire (consensus across sources).
• Status Ailment Weakness: Burn (consensus across sources).

Strategy:

1. Preparation: Equip Quartz that provide Freeze resistance. Have items ready to cure Freeze.
2. Phase 1: Focus all Fire-elemental Arts and Crafts on the Sentinel. Try to inflict Burn to deal damage over time.
3. Phase 2: When the Ice Golems appear, decide whether to eliminate them first or focus fire on the Sentinel. The Golems are also weak to Fire. Use AoE Arts to damage both the Sentinel and Golems. Be ready to heal and cure Freeze after 'Absolute Zero'.
4. Brave Orders: Use Brave Orders that boost Arts attack or provide elemental resistance.

Rewards:

• Mira
• Ice Shard Quartz
• Rare accessory (e.g., Frost Charm)