Summoner Acolyte

Hexproof
{t}: Add {g} to your mana pool. Spend this mana only to cast a Wizard creature spell.
{b}, {t}: Summoner Acolyte deals 1 damage to target creature that is not a Wizard.
The Summoners have discovered the magic ether that runs through nature. Their warlocks have all but died off abusing this power.