The Mysterious Ice Shard is an enemy that is located in the Ice Tomb. It is required to destroy in order to activate the bosses.
HP: 30,000 (+20% [6,000 HP] per player in Dungeon)
DEF: 0
EXP: 0
Location: Ice Tomb
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Since it doesn’t attack, there aren’t many tips besides shooting it. However, be prepared to back off once the bosses activate.