Slifer the Sky Dragon

This spell cannot be countered
Tribute Summon 3, Flying

If you cast Slifer without paying its costs, sacrifice it at the beginning of the next end step.

When a creature an opponent controls enters the field, it gets -4/-0. If its power would become 0 due
to this effect, destroy it.

Slifer gains +2/+2 for each card in your hand.