Oyaminartok, Polar Werebear

Oyaminartok, Polar Werebear has hexproof if
it hasn’t dealt damage yet.
Whenever Oyaminartok deals combat damage
to a player, create a Food token.
{u}, Sacrifice a Food: Draft a card from Oyaminartok’s spellbook. When you do, add
{u}{u}{u}. Spend this mana only to cast blue creature spells.