Hazezon Tamar

When Hazezon Tamar enters the battlefield
create X 1/1 Sand Warrior creature tokens
that are red, green, and white at the beginning
of your next upkeep, where X is the number
of lands you control at that time.
When Hazezon leaves the battlefield, exile
all Sand Warriors.
There is no escape—we pay for the violence of our ancestors. - Paul Atreides