Week after we started Naxxramas first time, we entered in chamber of the last two bosses. Both bosses were quite easy after all. Both went down at third attempt.
SapphironSapphiron kill shotFirst we tried this with two healers, only three having frost resistance gear. Big raid damage was bit too high to handle with two healers, so one of us rerolled. "One shotted" this with three healers.
Kel'thuzadKel'thuzad kill shotWithout lag and low spell details, this Lich could've been one shotted. This was too easy boss for last boss of Naxxramas. Naxxramas cleared. Good job all.