Magician's Circle

When one or more Wizards you control attack,
place a magic counter on this card.
{t}, Remove a magic counter from this card: Add
a mana of any colour to your mana pool. Use this
only to cast a Wizard spell.
{t}, Remove two magic counters from this card:
Wizards you control gain +1/+1 until end of turn.
{t}, Remove four magic counters from this card:
Put a Wizard from your graveyard onto the
battlefield under your control.