Replenishing Koi Pond

Enchant Island you control
When Replenishing Koi Pond enters the
battlefield put a 1/1 blue fish creature token
onto the battlefield under your control.
Enchanted land has "At the beginning of your
upkeep you may pay {1} If you do put a 1/1 blue
fish creature token onto the battlefield. You may
do this only once per turn."