Just recently, I ran into a game where, if Id actually been counting, Constant Mists had undoubtedly been cast at least twenty times
Collector Booster-exclusive special treatment in 3% of boosters
Blastoise - 2/102 (Base Set) 1999
Just dont want to discourage you while pointing out the lack of authenticity
If youre running snow lands, getting this enchantment out is easy, and, unlike other white removal spells, theres no penalty associated with On Thin Ice
Combine a Cloudstone Curio, Phyrexian Altar, Life Finds a Way, mana, and a nonartifact creature token, and you can make token copies of your creature through population, then the Altar uses a neverending resource to pay for the Dreadnought again