Abyssal Nocturnus

Creature — Horror

Produces: nothing.

Cares about: anything being discarded.

Partners

1,609 cards can cause anything being discarded.

1. Ill-Gotten Gains — When Ill-Gotten Gains discards a card, Abyssal Nocturnus gives +2/+2
2. Tasigur's Cruelty — When a permanent discards a card thanks to Tasigur's Cruelty, Abyssal Nocturnus gives +2/+2
3. Cabal Therapist — When Cabal Therapist discards a card, Abyssal Nocturnus gives +2/+2
4. Madame Masque — When Madame Masque discards a card, Abyssal Nocturnus gives +2/+2
5. Plague Reaver — When Plague Reaver discards a card, Abyssal Nocturnus gives +2/+2
6. The Eldest Reborn — When a permanent discards a card thanks to The Eldest Reborn, Abyssal Nocturnus gives +2/+2
7. Sheoldred // The True Scriptures — When a permanent discards a card thanks to Sheoldred // The True Scriptures, Abyssal Nocturnus gives +2/+2
8. Arbiter of Woe — When a permanent discards a card thanks to Arbiter of Woe, Abyssal Nocturnus gives +2/+2

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