For anyone new to this fight, the #1 dumbest way you can kill yourself during phase 1 is by dying to these two debuffs. They are both the easiest damage mechanics to avoid in this game - you simply stop doing anything.
Instability — Using magic while afflicted with Unchained Magic will build up unstable energy, dealing 2,000 Arcane damage to the caster per spell cast, 5 seconds after spellcasting ends. Stacks 99 times.
Permeating Chill — Physical attacks against Sindragosa have 20% chance to debuff the attacker with Chilled to the Bone, inflicting 1,000 Frost damage every 2 seconds for 8 seconds, per application.
