Selesnya Signet

an artifact is cast — 3,629 cards in the game can cause this (Selesnya Signet is one).

When Selesnya Signet is cast:

1. Mendicant Core, Guidelight — copies a spell
2. Sai, Master Thopterist — makes a token
3. Ravenous Robots — makes a token
4. Pinnacle Emissary — makes a token
5. Mirrodin Besieged — makes a token
6. Poetic Ingenuity — makes a token
7. Digsite Engineer — makes a token
8. Myrsmith — makes a token
9. Riddlesmith — draws you 1 card
10. Dr. Madison Li — puts a counter on a permanent you control

267 other cards care about it too. These are the ones with the most connections.

a nontoken artifact enters the battlefield — 3,711 cards in the game can cause this (Selesnya Signet is one).

When Selesnya Signet enters:

1. Ultron, Artificial Malevolence — makes a token
2. The Prydwen, Steel Flagship — makes a token
3. Surge Conductor — proliferates
4. Replication Specialist — makes a token
5. Weapons Manufacturing — makes a token
6. Mirrorworks — makes a token

an artifact enters the battlefield — 4,580 cards in the game can cause this (Selesnya Signet is one).

When Selesnya Signet enters:

1. Transplant Theorist — draws you 1 card
2. Elvish Archivist — puts 2 +1/+1 counters on itself
3. Golbez, Crystal Collector — surveils
4. Sludge Strider — makes a player lose 1 life
5. Underhanded Designs — gains you 1 life
6. Mechan Assembler — makes a token
7. Glassdust Hulk — gets +1/+1
8. Rook Turret — draws you 1 card
9. Hedron Detonator — deals 1 damage
10. Pactdoll Terror — makes each opponent lose 1 life

55 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 26,290 cards in the game can cause this (Selesnya Signet is one).

When Selesnya Signet enters:

1. HYDRA Assault Robot — deals 1 damage
2. Era of Innovation — puts a counter on a permanent you control

38 other cards care about it too. These are the ones with the most connections.

anything is cast — 30,901 cards in the game can cause this (Selesnya Signet is one).

When Selesnya Signet is cast:

1. Sokka, Bold Boomeranger — puts a +1/+1 counter on itself
2. Saheeli, Radiant Creator — puts a counter on a permanent you control

9 other cards care about it too. These are the ones with the most connections.