Requires

Life Chisel must be on the battlefield. Kenrith, the Returned King must be on the battlefield. Carnival of Souls must be on the battlefield. Su-Chi must be on the battlefield. It is your upkeep. Mana needed:

Steps

1. Activate Life Chisel by sacrificing Su-Chi.
2. Su-Chi triggers, adding .
3. Resolve the Life Chisel trigger, gaining 4 life.
4. Activate Kenrith's fifth ability by paying , returning Su-Chi from your graveyard to the battlefield.
5. Su-Chi enters the battlefield, triggering Carnival of Souls, adding and causing you to lose 1 life.
6. Repeat.

Results