Wingmantle Chaplain dies, triggering Nim Deathmantle, causing you to pay ({4} magic symbol) to return Wingmantle Chaplain from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Wingmantle Chaplain enters the battlefield, its first ability triggers, creating at least four 1/1 Bird creature tokens.
Activate Phyrexian Altar three times by sacrificing three Birds, adding ({3} magic symbol) .