Glaze Fiend

Artifact Creature — Illusion

Produces: nothing.

Cares about: an artifact entering the battlefield.

Partners

1,090 cards can cause an artifact entering the battlefield.

1. Ruthless Technomancer — When a Treasure enters thanks to Ruthless Technomancer, Glaze Fiend gives +2/+2
2. Teval's Judgment — When a Treasure enters thanks to Teval's Judgment, Glaze Fiend gives +2/+2
3. Fain, the Broker — When a Treasure enters thanks to Fain, the Broker, Glaze Fiend gives +2/+2
4. The Sackville-Bagginses — When a Treasure enters thanks to The Sackville-Bagginses, Glaze Fiend gives +2/+2
5. Transmogrant Altar — When a Zombie enters thanks to Transmogrant Altar, Glaze Fiend gives +2/+2
6. Spawning Pit — When a Spawn enters thanks to Spawning Pit, Glaze Fiend gives +2/+2
7. Basalt Golem — When a Wall enters thanks to Basalt Golem, Glaze Fiend gives +2/+2
8. Ashnod, Flesh Mechanist — When a Powerstone enters thanks to Ashnod, Flesh Mechanist, Glaze Fiend gives +2/+2

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