Eralith Renoit, Ice Weaver

Skulk
Whenever Eralith, Ice Weaver deals combat
damage to a player, put that many blue Ice
Lattice artifact tokens onto the battlefield.
Sacrifice X artifacts named Ice Lattice: Destroy
target attacking creature with converted mana
cost X or less. That creature's controller puts the
top X cards of his or her library into his or her graveyard.