Limayo, Jungle Predator

Whenever you tap a creature for mana, add {u} and draw a card.
Whenever you tap a land for mana, add {g} and
draw a card.
Whenever you cast a spell that adds mana to your
mana pool, add {r} and draw a card.
{u}{r}{g}, {t}: Add {c}{c}{c}{c} to your
mana pool.