Time Elemental
Legends — rare
Creature — Elemental
Time Elemental rulings:
2007-09-16: If Time Elemental attacks or blocks, but you no longer control it at end of combat, you can’t sacrifice it. However, it will still deal 5 damage to you.
2005-08-01: A “permanent that isn’t enchanted” is a permanent with no Auras on it.
2004-10-04: You both sacrifice it and deal the 5 damage at end of combat.