Activate Ashnod's Altar by sacrificing Orzhov Enforcer, adding {C}{C}.
When Orzhov Enforcer dies, it and Nim Deathmantle trigger,
Resolve the Orzhov Enforcer trigger, creating a creature token.
Holding priority, activate Ashnod's Altar by sacrificing a creature token, adding {C}{C}.
Resolve the Nim Deathmantle trigger, causing you to pay {4} to return Orzhov Enforcer from your graveyard to the battlefield and attach Nim Deathmantle to it.
Repeat.

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Nim Deathmantle

Ashnod's Altar

Orzhov Enforcer

Activate Ashnod's Altar by sacrificing Orzhov Enforcer, adding {C}{C}.
When Orzhov Enforcer dies, its afterlife ability triggers, creating a 1/1 Spirit creature token.
Activate Ashnod's Altar by sacrificing the Spirit, adding {C}{C}.
Activate Prismite by paying {1}, adding {B}.
Activate Kenrith's fifth ability by paying {3}{B}, returning Orzhov Enforcer to the battlefield from your graveyard.
Repeat.

Kenrith, the Returned King

Heartstone

Prismite

Activate Ashnod's Altar by sacrificing Orzhov Enforcer, adding {C}{C}.
When Orzhov Enforcer dies, its afterlife ability triggers, creating a 1/1 Spirit creature token.
Activate Ashnod's Altar by sacrificing the Spirit, adding {C}{C}.
Activate Prismite by paying {1}, adding {B}.
Activate Kenrith's fifth ability by paying {2}{B}, 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.

Infinite card draw for any number of players

Infinite colored mana

Infinite colorless mana

Infinite draw triggers for any number of players

Infinite lifegain

Infinite lifegain triggers

Return all creature cards from all graveyards to the battlefield under your control

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