Leviathan

( X is the number of {e} on Leviathan )
Ward {x}
{e}{e}
(+1): Scry 3. Add {e} per scry.
(0): Leviathan gains Unblockable and Vigilance until end of turn.
(-2): Return a permanent with mana value X or less to the top of its owner's Library. You may repeat this process by paying {e}{e}.