Yuumi, Norra's Familiar

Bestow {1}{g/w}{g/w}, Champion, Hexproof
Place a +1/+1 counter on me at your upkeep.
Enchanted creature gains +3/+3 and Hexproof.
Place a +1/+1 counter on enchanted creature at
your upkeep.
When the creature I'm Bestowed to dies,
return me to hand.