Albus Dumbledore

Professor (Whenever a nontoken creature enters the battlefield with a lower power or toughness than this creature, put a +1/+1 counter on it)
{w},{t}: Gain 1 life for each Plains you control
{u},{t}: Draw 1 card for each Island you control
{b},{t}: Add {b} for each swamp you control
{r},{t}: Deal 1 damage to any target for each
mountain you control
{g},{t}: Creatures you control get +1/+1 for each
forest you control