You must choose three different targets in order to cast Incremental Growth. You decide how many +1/+1 counters each creature will get as part of casting the spell.
20-09-2014
wotc
If some of the creatures are illegal targets as Incremental Growth tries to resolve, the remaining legal targets still get the appropriate number of +1/+1 counters. If all targets are illegal, Incremental Growth doesn’t resolve.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.