Kaiyo, Mistress of the Tides

At the beginning of your upkeep, put a flood
counter on each land. Then, if there are three or
more flood counters on a land, remove all flood
counters from permanents and each player draws
two cards.
Lands with flood counters on them have:
Whenever you tap this land for mana, for each
flood counter on it, add one mana of any color
this land could produce.