Witch of Candy

Flying, skillrush (The first activation of this card's activated abilities has no generic mana cost, until end of third turn since entering the battlefield.)
You don't lose mana as steps, phases and turns end.
{6}, {t}, Exile Candy Witch: Create X colorless Candy artifact tokens with "Sacrifice this artifact: Add {b}", where X is the amount of mana in your mana pool.