Midnight Reaper This is the weakest one of the lotbecause all it does is draw tons of cards and make sacrifice decks more powerful
Theres also a very real chance that these become valuable beyond Magic spaces, as signed Star Trek memorabilia almost certainly holds weight in fandom spaces
Literally all of it all of it
Whenever Kain deals combat damage to a player, that player gains control of Kain, but you get to draw cards
Of course, it doesnt prevent any damage to itself, which is a bummer, but the ability to slap this card down and then play a Star of Extinction with a full board putting 20 +1/+1 counters on all of your creatures (except for Vigor) is a play that will likely cause your foe to concede on the spot
If you didn't know, the prisoner's dilemma is the simplest depiction of game theory in economics