Messmer, the Impaler

Haste, Menace, Ward - Sacrifice a creature

When Messmer attacks, he deals damage equal to the number of creatures you control to target creature defending player controls.

Whenever a non-fireknight creature dies during the combat phase, it is exiled instead and you create a red fireknight creature token with menace and power and toughness equal to the base power and toughness of that creature.