Lingua Foeda Acheronsis

Flash, Haste, Menace
As an additional cost to play this spell, sacrifice a creture.
Lingua Foeda Acheronsis must attack each turn if able. If it cannot attack,
sacrifice it and put a -1/-1 counter on up to one target creature.
Whenever Lingua Foeda Acheronsis attacks, destroy target creature an opponent
controls with the lowest toughness of creatures in play.