The red sorcery Prisoner's Dilemma is just a fun time with your opponents
PanharmoniconPanharmonicon, Yarok, the DesecratedYarok, the Desecrated, and Doubling SeasonDoubling Season will double up the cards you draw, so they're definitely cards to play in this deck
Edgar Markov does that on attack, Drana, Liberator of Malakir will give +1/+1 counters to all attacking creatures when it deals combat damage, and Rakish Heir gives all Vampires the ability that when they deal combat damage, they get a +1+/+1 counter
No, not all villains need a villainous choice
Jaheiras Respite While its no Inkshield, there are plenty of effects that could make it work that way
The deck isn't the strongest and is on the slow / risky side of things, but it's certainly one of the most unique decks you'll come across in the format