Immortal Guardian

Immortal Guardians are faceless ones that spawns during the Yogg-Saron encounter in Ulduar.

Abilities
Melee for ~20-25k on plate to start with full empowered stacks.
 * Immortal - Immortal Guardians cannot be slain except by Titanic Storm while at 1% HP.
 * Immortal - Immortal Guardians cannot be slain except by Titanic Storm while at 1% HP.
 * Immortal - Immortal Guardians cannot be slain except by Titanic Storm while at 1% HP.

Strategies
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