The Cerulean Grotto

At the beginning of your upkeep, scry 1.
Whenever you cast a Creature or Instant spell,
you may put a charge counter on The Cerulean
Grotto.
{1}{u}, Remove a charge counter from The
Cerulean Grotto: Draw a card.
{1}{g}, Remove a charge counter from The
Cerulean Grotto: Put a +1/+1 counter on target creature you control.