By feeding any non-Spirit creature to Phyrexian Altar, you generate a mana of any color while triggering Requiem Angel to replace its death with a token creation. That is where Divine Visitation swoops in, seamlessly intercepting the process to upgrade what would have been a modest Spirit into a formidable 4/4 Angel with flying and vigilance. Since this fresh Angel is also a non-Spirit creature, it can be immediately sacrificed back to the Altar to continue the loop indefinitely, fueling your engine for infinite mana, death triggers, and airborne beatdown.