Think of it like mutating in Magic: The Gathering pay a reduced cost to replace a card already on the board
Itd be a little hard to keep track of, what with Evolve giving it +1/+1 counters and Prowess giving it a temporary +1/+1, but it would still make for a very interesting and fun to play rare
If youre looking for something quirkier in the Voltron-sphere, I can recommend Nahiri, Forged in Fury, who is an excellent go-wide equipment Commander that pivots well to a Voltron finish
The last Magic card of the week is an Elven Sol Ring from Lord of the Rings: Tales of Middle-earth
You can also use this as an infinite mana outlet in Commander, sending lethal damage to each of your three opponents
Since your commander only needs to do 21 damage to take a player out, this card can be even more dangerous