Silex, the Hollow Dreamer

Hexproof. Cannot attack or block.
At the beginning of each upkeep, exile the top card each player's library then Scry 1.
{3}{c},{t}: Discard a card and gain life equal to it's converted mana cost. Cast any card in exile without paying it's mana cost, then lose life equal to it's converted mana cost.
Marvel of artifice. Savior of Shaddath. Slave.