Onyxia is a level ?? boss with 1,099,230 health. Before the fight have your raid note the east and west sides of her lair. Stay away from them , if you get too close a ton of whelps will hatch.

Phase 1

1. This phase last till she is at 65% health.
2. Flame Breath which does a lot of damage to anyone in front of her, try moving to her sides at this point.
3. Cleave which hits 10 of the nearest raid members.
4. Knock Away done only to the tank.
5. Tail Sweep is done to anyone close to her tail and does up to 1,000 damage and knocking you back.
6. Wing Buffet a cone damage dealing ability which knocks anyone in front of her back.

Phase 2

1. During this phase she will cast random fireballs at the party and also do a massive AoE flame damage ability. You can avoid the AoE by moving to the side of her.

Phase 3

1. This phase is a repeat of Phase 1, with an AoE fear. You need to be very careful of your positioning here because it can send you right into the whelp eggs. If this happens you're in trouble!
2. Watch out for the lava on the floor and finish the fight.