Pitiless Vizier

Creature — Minotaur Cleric

Produces: nothing.

Cares about: anything being discarded.

Partners

98 cards can cause a Minotaur creature it grants abilities to.

1. Felhide Petrifier — Felhide Petrifier gives Pitiless Vizier an extra ability

578 cards can cause a Cleric it boosts.

1. Shadow-Rite Priest — Shadow-Rite Priest gives Pitiless Vizier bigger stats

1,609 cards can cause anything being discarded.

1. Conqueror's Galleon // Conqueror's Foothold — When Conqueror's Galleon // Conqueror's Foothold discards a card, Pitiless Vizier grants a keyword
2. Dirty Wererat — When Dirty Wererat discards a card, Pitiless Vizier grants a keyword
3. Cabal Initiate — When Cabal Initiate discards a card, Pitiless Vizier grants a keyword
4. Putrid Imp — When Putrid Imp discards a card, Pitiless Vizier grants a keyword
5. Ill-Gotten Gains — When Ill-Gotten Gains discards a card, Pitiless Vizier grants a keyword
6. Oath of Lim-Dûl — When Oath of Lim-Dûl discards a card, Pitiless Vizier grants a keyword
7. Cabal Therapist — When Cabal Therapist discards a card, Pitiless Vizier grants a keyword
8. Bloodsoaked Altar — When Bloodsoaked Altar discards a card, Pitiless Vizier grants a keyword

371 other cards cause it too, equally specific. The ones shown are the best connected.