I mean, its not a bad card, and its mechanically a good card for your decks, but the mechanics arent a nice fit, and adding Mirage in front of it doesnt really work for me as a way to run it here
We aren't psychic like Mew, but for that price, it seems like a steal
The main difference is that while Eternal Witness usually requires a blink or recursion effect to use again, Evolution Witness triggers when one or more +1/+1 counters are placed on it
Bo3 is better if your deck improves after sideboarding or you like longer, more controlled matches
I think these MB foils are primed to jump soon, and if you can out them in playsets when theyre ready to sell then that just makes life all the easier
For example, Strionic Resonator can copy your enter the battlefield abilities of cards with initiative like Caves of Chaos Adventurer Since youll be using cards like Xanathar, Guild Kingpin to play cards from your opponents, theres a slight chance that you run into cards that can venture into the dungeon even before you get the initiative, (maybe you snag a Nadaar, Selfless Paladin, for example)