Kenrith, the Returned King + Ashnod's Altar + Training Grounds + Prismite + Orzhov Enforcer
Kenrith, the Returned King
Ashnod's Altar
Training Grounds
Prismite
Orzhov Enforcer
Infinite card draw for any number of playersInfinite colored manaInfinite colorless manaInfinite death triggersInfinite draw triggers for any number of playersInfinite creature ETBInfinite lifegainInfinite lifegain triggersInfinite creature LTBInfinite creature sacrifice triggersReturn all creature cards from all graveyards to the battlefield under your controlInfinite draw triggers for any number of opponentsInfinite +1/+1 counters on creatures you control
How it works
Activate Ashnod's Altar by sacrificing Orzhov Enforcer, adding CC.
When Orzhov Enforcer dies, its afterlife ability triggers, creating a 1/1 Spirit creature token.
Activate Ashnod's Altar by sacrificing the Spirit, adding CC.
Activate Prismite by paying 1, adding .
Activate Kenrith's fifth ability by paying 2, returning Orzhov Enforcer to the battlefield from your graveyard.
Repeat.
Once you have infinite mana, you may use it to activate Kenrith's other abilities.
This engine relies on Training Grounds to fundamentally rewrite the math of Kenrith, the Returned King, discounting his resurrection ability down to a manageable cost that Ashnod's Altar can help support. By cycling Orzhov Enforcer back and forth between the battlefield and the graveyard, you continuously harvest two colorless mana from Ashnod's Altar while leveraging Prismite to filter that surplus into the exact black mana needed to fuel Kenrith's recursion. Because Orzhov Enforcer leaves behind a Spirit token via Afterlife, you even generate extra material to sacrifice along the way, ultimately looping your way into infinite colored mana, infinite life, and infinite card draws.