
Whenever you cast a noncreature spell, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Flux Channeler has 3 printings, first in War of the Spark (2019). EDHREC ranks it #1,240 among Commander cards. It appears most in Atraxa, Praetors' Voice decks (18,717 on EDHREC). 1 public deck on TCG runs it. It has 7 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.