Nim Deathmantle attached to any creature you control with power two or greater except the creature with One with the Kami attached.
Steps
Activate Phyrexian Altar by sacrificing the creature with Nim Deathmantle attached, adding ({1} magic symbol) .
The creature dies, triggering Nim Deathmantle and One with the Kami.
Resolve the One with the Kami trigger, creating at least four 1/1 Spirit creature tokens.
Activate Phyrexian Altar three times by sacrificing three Spirit tokens, adding ({3} magic symbol) .
Resolve the Nim Deathmantle trigger from step 2, causing you to pay ({4} magic symbol) to return the creature from your graveyard to the battlefield, and attach Nim Deathmantle to it.