Kel'Thuzad

Quick Tactics

Phase 1

Phase 2

Two areas - the boss room and the Phylactery

Boss Room - adds phase

Phylactery - ghosty boss

Phase ends when the ghost boss finishes cast - any adds remaining upstairs will be empowered - kill asap.  

Phase 1 starts again, but boss casts more often.  Repeat until Phylactery boss dies, then Phase 3 starts.

Phase 3