You must distribute at least 1 damage to each target.
16-09-2007
wotc
You divide the damage as you cast the spell. You can’t redistribute the damage if any of the target creatures becomes illegal before the spell resolves.
16-09-2007
wotc
If X is 0, the number of targets must also be 0.
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.