Kenrith, the Returned King + Selvala, Heart of the Wilds + Ashnod's Altar
Kenrith, the Returned King
Selvala, Heart of the Wilds
Ashnod's Altar
Infinite creature LTBInfinite creature ETBInfinite colored manaInfinite creature sacrifice triggersInfinite death triggersInfinite colorless manaInfinite lifegain triggersInfinite lifegainReturn all creature cards from all graveyards to the battlefield under your controlInfinite card draw for any number of playersInfinite draw triggers for any number of opponentsInfinite +1/+1 counters on creatures you control
How it works
If Selvala has summoning sickness, activate Kenrith's first ability by paying , giving all creatures haste until end of turn.
Activate Selvala by paying and tapping it, adding at least 2.
Activate Ashnod's Altar by sacrificing Selvala, adding CC.
Activate Kenrith's fifth ability by paying 4, returning Selvala from your graveyard to the battlefield.
Repeat.
This brilliant loop turns Kenrith, the Returned King into a self-sustaining engine by utilizing his final activated ability to continuously cheat Selvala, Heart of the Wilds back from the dead. Whenever Selvala enters the battlefield, she immediately repays the mana investment by tapping for massive amounts of green and colored mana thanks to her own power-scaling ability, while Ashnod's Altar acts as the necessary sacrifice outlet to send her right back to the graveyard. Because Kenrith, the Returned King also grants haste with his red ability if Selvala ever suffers from summoning sickness, you can instantly loop this process as many times as you like.