Originally Posted by
thehordemage
what Draco said is correct, and from my personal experience (having received the legendary) and research
- dying at any point in the fight will not spawn the heart (just wipe and rego), there is no 1 attempt per lockout restriction
- the damage reduction debuff does not apply after rag submerges. if you do this on normal work with your healers before you go all gung ho in the lava. obviously if you do it on heroic there is no lava so you just walk up and click the loot bag (and if you die in lava on normal attempting to get it you cannot loot it anymore)
- that debuff is applied to you immediately at the start of the fight and remains until the fight ends