Berrin of the Spire

Flying, first strike, haste
Color-shift (can only cast spells the same color as the creature)
Berrin of the Spire starts the game as Boros-shifted ({r}{w})
{w}: Berrin of the Spire White-shifts. Creatures you control have +0/+1 and first strike.
{r}: Berrin of the Spire Red-shifts. Creatures you control have +1/+0 and haste.
{r}{w}: Berrin of the Spire Boros-shifts. The next spell you cast costs {2} less to cast.