Its an efficient engine to be sure letting you stock up mana when you cast red spells, which mono-red decks are wont to do
Reveal Cataclysmic Gearhulk, and it doesnt matter if they take it or not
As if this werent fiendishly clever enough, Mark could actually transform into an even more dedicated Cranial Extraction deck himself, even featuring a Psychic Spear for added flexibility in Gifts piles, letting him punish opponents who had scouted him and knew of his transformational plan
Notably, Solitude can be cast without mana, and that's a powerful effect
if you lose your creatures to a sweeper, you can just play some more, crew your vehicles, and get right back to attacking
Domain Expansion in Union Arena (to use a parallel) and equivalent high-impact One Piece TCG events are often Uncommon