Delfen Yellowknife

Whenever you tap Delfen Yellowknife for its
Ability put two -1/-1 Counters on it unless the
cost of its Ability is paid entirely in non-Land
Mana Sources.
{x}{t}: Reveal an Instant or Sorcery Spell from
your Hand, {x} equals the revealed cards CMC,
and then play it with one of the following.
•Copy the Spell with new Targets
•The Spell deals an additional 4 Damage