Unable to cast Vanishing Verse against a black creature copy created with Assemble From Parts
My opponent cast Assemble From Parts on Toxrill, The Corrosive and then created the copy of the creature. The copy couldn't be targeted by Vanishing Verse even though it was only a single color (the original creature is black and the copy was made black as part of Assemble From Parts' ability). Black + black is still just black and should be a valid target. The same problem happening when I tried to target a copy of Cemetery Desecrator. See screenshot.