Whenever another creature you control enters, you gain 1 life.
Whenever another creature you control dies, each opponent loses 1 life.
Flood the board with creatures and tokens, then turn their entrances and deaths into incremental drain that ends the table. Elas il-Kor converts every ETB into life and every death into damage, so you grind value while aristocrats sacrifice loops and token swarms whittle opponents to zero.
Closes games without combat through symmetrical drain triggers
Cheap, low to the command zone, and recasts easily
Rewards both go-wide tokens and sacrifice loops
Deathtouch makes it a respectable blocker and removal magnet deterrent
Drain is only 1 life per death—needs volume or doublers to be lethal
Heavily reliant on the commander; board wipes and graveyard hate hurt
No card advantage built in; can run out of gas
Vulnerable to lifegain/lifeloss prevention and exile-based removal