Sofie, Queen of Loafs

Sofie, Queen of Loafs enters the battlefield tapped
and doesn't untap during your untap step.
At the beginning of your upkeep, pay {r/w}{r/w}{r/w} or tap Sofie, Queen of Loafs.
At the beginning of combat, you may exert Sofie,
when you do, Sofie gets +20/+0 and irresistible
until end of turn (she has unblockable
unless you give her treats)