It would unlock nearly 500 cards, giving a massive boost to mono- and dual-color decks, which often struggle to keep up with the sheer card quality available to three-or-more-color strategies
For some reason, Optimus Primes Bolster ability isnt restricted to Artifact Creatures (unlike many of the other Transformers here), meaning he is much more useful in regular Commander decks and not one specifically built around Artifacts
[19] [20] The first set was released in August 2017, and the second was released in September 2017, with pre-orders starting on April 23, 2017
If the point of art is to make you feel something, then the Mystical Archive has done an incredible job
You can see my upgrade article for Reap the Tides here, and Kristen Gregorys article for Arm for Battle here for some inspiration
Insidious Roots fits into decks like Teval, the Balanced Scale, The Necrobloom basically anything that uses the graveyard for value