Quote Originally Posted by deviant View Post
Uncastable unless under moon = unplayable.

Also; in a deck that discards, pitches to mox etc. you can easily throw away the "excessive" copies.
Also; you really don't want to cast three blood moons either - you still play ~8. Because you want to assure that you can play them early.
Actually you do want to play multiple copies of the Moon, the reason being it makes it all the harder for the opponent to address the issue of removing the moon effect. At least that has been my experience... or at the very least you want to have an additional moon in hand in case they do manage to remove the first moon somehow.