Beholder

Hexproof
{u}{u}{u}{t}: Counter target spell.
{4}{t}: Draw a card, Reveal it and if it's a creature
you may exile it. You can cast it from the exile
pile at anytime for {2} less.
You can also choose to cast it for free and if
you do this each opponent
may play a creature with mana equal or
less than the one you casted.