Mindleech Ghoul

Most exploit payoffs in this family drain life, refill a hand, or grow a body; this one converts a sacrificed creature into pressure on the opposing grip, forcing each opponent to exile a card. What sets the effect apart is who does the choosing. The opponent picks, so this is no Thoughtseize surgically pulling the answer you fear; it plays closer to an Ostracize-style bite, where the defender parts with their least useful option. Against a full hand you rarely strip the exact card you wanted, but against a grip already whittled to two or three live spells, the choice tightens and the exile starts cutting into resources that matter. Feeding a creature to the ability means the ghoul is happiest over a board of expendable fodder rather than deployed as a bare two-drop. The seam it occupies is what makes it worth building around: aristocrat shells want death triggers and sacrifice outlets, while black disruption wants to empty the opposing hand cheaply, and this lives between the two, letting a token or a spent attacker double as a hand attack. Exile rather than discard is the closing wrinkle: whatever the opponent surrenders cannot return through the flashback, escape, and disturb effects that reward a stocked graveyard.