Rapacious One does not have summoning sickness and cannot be blocked by an opponent.
Steps
Deal combat damage to an opponent using
Rapacious One.
Rapacious One triggers, creating at least five 0/1 Eldrazi Spawn creature tokens.
Activate
Phyrexian Altar five times by sacrificing five Eldrazi Spawns, adding ({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.
Repeat each combat phase.
If
Rapacious One has power six or greater and/or a Warrior you control can attack, this combo nets infinite creature tokens.
Results
Infinite combat phases.
Infinite creature tokens with haste.
Infinite death triggers.
Infinite ETB.
Infinite lifegain.
Infinite lifegain triggers.
Infinite LTB.
Infinite sacrifice triggers.
Infinite colored mana.
Infinite colorless mana.
Infinite combat damage.
Metadata
In 2 decks according to EDHREC.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).