Mistral's Prophecy

Mistral's Prophecy enters the battlefield with
three prophecy counters on it.
{u/b}, {t}, remove a prophecy counter form
Mistral's Prophecy: target noncreature dream
you control becomes a 0/0 nightmare creature.
Put four +1/+1 counters on it.
At the beginning of your upkeep, if you control
four or more faeries, put a prophecy counter on
Mistral's Prophecy.