Reveka, Wizard Savant

Whenever a Wizard enters the battlefield under
your control, you may draw a card. If you don't, Reveka, Wizard Savant deals 2 damage to target creature. That creature doesn't untap during its controller's next untap step.
{t}: Target artifact gains "{t}: Add one mana of
any color."
"It's nice to see a sister Dwarf in a position of such
power, but why'd it have to be one of those seafaring muleheads?" -Halina, Dwarven Trader