Dwarven Feast

All red creatures gain +1/+0.
All white creatures gain +0/+1.
{r/w}{r/w}, Exile Dwarven Feast: Tap all creatures. They don't untap during the next untap step.
"Sure, Dwarves know how to roast a boar. But you must have their iron stomach to survive an entire banquet." - Bjorn Thorvaldsson