Cloud of Darkness is two colors, and I think thats a fair way to balance it a little because the ability to kill a creature and get a 3/3 flier is extremely powerful
Game-changing planeswalkers like Chandra, Awakened Inferno, Teferi, Hero of Dominaria, or the mighty Jace, the Mind Sculptor benefit from these strategies as theyre usually protected
It's legal in Modern and has made appearances in decks like Soul Sisters
Wrath of God
This is a big step for Wizards, who previously have released Universes Beyond products in a way that only allowed them to be legal for eternal formats including Modern, Legacy, Vintage, and most importantly Commander
Its a simple but effective way to convert tokens into mana advantage without slowing down your game plan