Thunderstorm: Deals 2 damage to
every enemy creature.Rain of Fire: Deals 3 damages to
every enemy creature. Removes invisibility.
Pandemonium: A random effect is inflicted to
every creature on the field. Removes invisibility.
Retrovirus: Sacrifice Retrovirus to inflict 1 damage per round to
every enemy creature.Plague: Infect
every enemy creature (Inflicts +1 poison on
every enemy creature). Removes invisibility.
So, my question is, why are immaterial creatures (Phase Dragon, Immortal, etc.) exempt from this rule?
Let's take a look at the definition of "Immaterial" as declared by zanzarino and by Merriam-Webster.
zanz's definition: Creature can not be targeted.
Merriam-Webster definition: Not consisting of matter.
Now, it would make sense if a being that did not consist of matter wasn't affected by Rain of Fire or Plague, but a creature that "can not be targeted" should be. Let's use a metaphor:
If you're going to bomb a town, are you targeting every human in that town individually? No. You're targeting the town as a whole. Using the definition "can not be targeted," the humans that "can not be targeted" should still be killed because, although they weren't targeted by the bomb, they died in the impact.
So, I propose that Mass-CC either has an effect on immaterial creatures, or zanz's definition of "Immaterial" needs to change, because logically, it does not make sense for being that "can not be targeted" to not be affected by mass-CC.