Living Hive does not have summoning sickness, and cannot be blocked by an opponent.
Steps
Deal combat damage to an opponent using Living Hive.
Living Hive triggers, creating six 1/1 Insect creature tokens.
Activate Phyrexian Altar at least five times by sacrificing at least five Insects, adding at least ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) .
Activate Najeela by paying ({W} magic symbol) ({U} magic symbol) ({B} magic symbol) ({R} magic symbol) ({G} magic symbol) , untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.