Rainy Season

{u}: Put a flood counter on target land.
Lands with flood counters on them add an additional {u}.
{u}{u},{t}: Return target land with at least one flood counter on it to it's owners hand.
{u}{u}{u},{t}, remove a flood counter from target land: Return target creature to its owner's hand.
{u}{u}{u},{t}, remove six flood counters from a single land, return all creatures that land's owner controls to their owner's hands.