Nera, the Spell Drainer

Flash
When Nera, the Spell Drainer enters the battlefield, exile all instant and sorcery spells. Nera enters the battlefield with two +1/+1 counters on her for each spell exiled this way.
{x}, {t}, Remove a +1/+1 counter from Nera:
Copy a card exiled with Nera with converted
mana cost X and cast the copy without
paying its mana cost.