Geese Howard, Mastermind

Vigilance
Predictable! — {t}, {4}{u}: Put target spell or crea-
ture on top of its owner's library. This costs
{4} less to activate if the target's controller has cast
two or more spells sharing a mana value this turn.
Deadly Rave —Whenever you cast a spell, if there
are 3 or more different mana values among that
spell and spells you've cast this turn, destroy up
to one target creature or planeswalker.