Excess damage has been dealt to a creature if the damage dealt to it is greater than lethal damage. Usually, this means damage greater than its toughness, although damage already marked on the creature is taken into account.
16-04-2021
wotc
If the target creature is an illegal target by the time Pigment Storm tries to resolve, the spell won't resolve. It won't deal damage to any player.
16-04-2021
wotc
Pigment Storm's replacement effect is a self-replacement effect. It is applied before any other replacement effects that would change the amount of damage dealt to the target creature and its controller.
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.