The Doom Slayer

When The Doom Slayer enters the battlefield,
destroy target creature. If that creature is a Devil,
Imp, or Demon, exile it instead.
{1}, Remove an Ammo counter from The Doom
Slayer: The Doom Slayer deals 1 damage to any
target.
{x},{t}: Put X Ammo counters on The Doom
Slayer.