ETB Damage

Creatures that, the moment they hit the battlefield, deal damage to a target or drain life from opponents. Gray Merchant of Asphodel makes each opponent lose life equal to your black devotion, while Siege Rhino drains each opponent for 3 and gains you 3. These triggers reward blink and flicker effects that re-trigger them, and they double as incidental burn to push toward a kill. Distinct from ETB Removal, whose entry trigger destroys or exiles a permanent rather than dealing raw damage or draining life, and from ETB Value, whose entry trigger generates card advantage or ramp instead of burning the opponent.