The First Sliver

Mana Cost: {W}{U}{B}{R}{G}
Total Cost: 5
Type: Legendary Creature — Sliver
Description: Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Sliver spells you cast have cascade.
Power: 7
Toughness: 7
Colors: B,G,R,U,W