The fights begins with the eggs being invulnerable to damage. At start of their turn, the eggs explode dealing fire damage in a 2 cell radius. To make the eggs vulnerable, the boss must start her turn next to a player with 1.25x her dodge in lock. When O'stricha's eggs become vulnerable, she becomes enraged increasing her damage for 2 turns.
To make the boss vulnerable to damage, all the eggs must be destroyed.