Gilgamesh King of Hero's

Hexproof, Flying, Can't be sacrificed.
Protection from black.
This card can't be countered.
Gilgamesh King of Hero's gets a +2/+2 for each artifact named Gate of Babylon on the field.
Noble Phantasm {w}{w}{w}{w}{w}{t}: Target Creature or Planeswalker takes 20 damage.