John, Maniacal Genius

Flash
This creature cannot gain haste.
Whenever John, Maniacal Genius enters the battlefield, counter target spell.
Whenever an opponent casts a spell, if this card
doesn't have summoning sickness you may exile it,
then return it to the Battlefield under your control.
Whenever you counter a spell you may discard a card.
If you do draw two cards. This ability triggers only
once each turn.
"Stack Your Triggers Correctly"