Jar of Spells

{t}: Put a storage counter on Jar of Spells.
{x}{2}: Put X Storage counters on Jar of Spells.
At the start of your end step, you may pay 3 life.
If you do, return X Instant or Sorcery cards from
graveyards to your hand, where X is the amount of counters on Jar of Spells. Those spells cost {2} less to cast until end of turn.
Remove all counters from Jar of Spells.