Paul Ërdos, the Undead

As an additional cost to cast this spell, discard any
amount of Instants and/or Sorceries.
Whenever you cast an Instant or Sorcery from your graveyard, you may exile it. If you do, put a +1/+1 counter on this creature.
{u}: Discard a card, then surveil 2.
{b}, exile a nonland card from your graveyard: Until
your next turn, you may cast target Instant or
Sorcery card from your graveyard. It costs {2} less to
cast.