Madron, Bearer of the Dead

Mardron, Bearer of the Dead isn't a creature unless at least three creatures died this turn.

Indestructible, Menace

Whenever a creature you controls dies you may search your graveyard for an instant or sorcery and exile it, you may cast that card without paying its mana cost until end of turn.

In another age she was a kind and loving mother to the citizens of Hirxin. Now she rages through its ruins lamenting her butchered child.