Kapain Gleegun, Chaotic Midget

{p/b}: You gain 1 life.
{1}{p/g}: Create a 1/1 green squirrel with reach.
{2}{p/r}: Create a 1/1 red goblin with haste.
Whenever a goblin or squirrel enters the
battlefield under your control, you lose 1 life.
Whenever you lose life, add {b}, {g}, or {r} to
your mana pool.