The downside is that since Marvin is a colorless creature, running him as your commander severely limits the cards you have access to with strong activated abilities
Regardless of this, Limit Break goes really well with Fallout 's Scrappy Survivors deck, which features the same color identity and the same overall themes as Limit Break
explains that "Drone Pawn" can't be destroyed by battle while they control no other monsters, and during the turn it's attacked, they will regain LP equal to the damage they took after the Battle Phase ends
Then use Voltaic Key, Aphetto Alchemist, or Filigree Sages, among other cards, to untap Shorikai and do it again
1 Rare or mythic
Sauron, the Dark Lord is also a fantastic hit, selling for $150 at the lower end of sales for its Borderless Poster variant