Merry go 'Round

At the beginning of your end step, if Merry go 'Round has no charge counters on it, each player creates a white 2/2 Horse creature token.
At the beginning of your end step, if Merry go 'Round has one or more charge counters on it, each player draws a card.
At the beginning of your upkeep, put a charge counter on Merry go 'Round. Then, if it has two or more charge counters on it, remove them all.