Ancient Book

Once per turn, you can pay:
{w}{1}: All your creatures gain +1/+1 until end of turn.
{u}{1}: Tap 2 enemy permantents until end of the next turn.
{b}{1}, Sacrifice a creature: destroy a permanent.
{r}{1}: Deal 5 damage to the opponent. Take 2 damage.
{g}{1}: Gain 2 life for each creature you control.