Slifer the Sky Dragon

Haste, Flying, Absorb 3, Rampage X
When Summoned normally, it can't be negated, Sacrifice 3 Non-Token Creatures or this is an Enchantment instead. If this Card isn't
summoned normally, it is a Creature and
Sacrifice it at the end of your turn. Each time
an Enemy Creature is summoned, deal 3 Damage
to it. Protection from Spells with a Converted
Mana Cost of {3} or lower (even while not on
the field). X equals the number of Cards in
your Hand +3.