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
In fact, a lot of the time if they are on the play and they attack with Adventurer, you should not block with Thalia, because if you dont then they likely wont have a Turn 3 play
Notably, Solitude can be cast without mana, and that's a powerful effect
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
He's in every game except the first, and so Wizards has made a Cid card with 15 different arts