Whichever way you play it, this is cheap enough and powerful enough to be good in any deck
MTG Arena lets players play Magic: The Gathering on mobile and PC for free, giving the classic TCG a much lower barrier to entry
Once you've got your first draft of the deck, I suggest you lay it out in stacks organized by mana value
(To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there.) The value of X is determined only once, as Tromell's last ability resolves
I remember watching The Professor rock him in Game Knights, and I can't help but think of him fondly
The ability to choose what modes to select when casting the card makes them highly valuable (both in-game and oftentimes monetarily), as you can tailor their decisions based on your own board state