Normally, "any number of target [things]" can be "zero," but when you're dividing something (like damage), at least one target must be chosen if possible. So don't monstrify Polukranos when your opponent only has a deathtouch creature!
…and knowing is half the battlefield
Normally, "any number of target [things]" can be "zero," but when you're dividing something (like damage), at least one target must be chosen if possible. So don't monstrify Polukranos when your opponent only has a deathtouch creature!