To activate the Self-Destruct mechanism, you need to push the giant, shiny red button in the back of the room. It says "DO NOT PUSH" when you hover it! This will add some new things to the fight. During Phase 1 Mimiron will continuously spawn fires aimed at random raid members. The fire will follow you, but is relatively slow. He will continue to spawn fires during Phase 2 along with two new abilities: an AOE that will extinguish fires in melee range and he will also throw frost bombs at random locations throught the room. When they detonate they will cause 8,000 damage, knock back whomever is nearby and also extinguish fires near it. In Phase 4 he will spawn a new kind of robot that will kill the fires. Make sure when you are going to bring down the head, you do so in a spot that is clear of fire! Phase 4 is not so bad, but the fires of course continue. This means you will need to dodge them along with all his normal abilities!