Twinning Glass

a spell is cast — 155 cards in the game can cause this (Twinning Glass is one).

1. Glaring Fleshraker — When a spell is cast thanks to Twinning Glass, Glaring Fleshraker makes a token
2. The Kingpin of Crime — When a spell is cast thanks to Twinning Glass, The Kingpin of Crime drains each opponent
3. Leader's Talent — When a spell is cast thanks to Twinning Glass, Leader's Talent puts a counter on a creature
4. Elena, Turk Recruit — When Twinning Glass is cast, Elena, Turk Recruit puts a +1/+1 counter on itself
5. Nita, Forum Conciliator — When a spell is cast thanks to Twinning Glass, Nita, Forum Conciliator puts a counter on a creature
6. Treasury Thrull — When a spell is cast thanks to Twinning Glass, Treasury Thrull drains each opponent
7. Moira and Teshar — When Twinning Glass is cast, Moira and Teshar brings a card back
8. Teshar, Ancestor's Apostle — When Twinning Glass is cast, Teshar, Ancestor's Apostle brings a card back
9. Life Insurance — When a spell is cast thanks to Twinning Glass, Life Insurance drains each opponent
10. Norin the Wary — When a spell is cast thanks to Twinning Glass, Norin the Wary flickers itself

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

an artifact is cast — 3,683 cards in the game can cause this (Twinning Glass is one).

When a spell is cast thanks to Twinning Glass:

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

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

a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Twinning Glass is one).

When Twinning Glass enters:

1. Ultron, Artificial Malevolence — makes a token
2. The Prydwen, Steel Flagship — makes a token
3. Conquest Mission — puts a quest counter on itself
4. Surge Conductor — proliferates
5. Replication Specialist — makes a token
6. Weapons Manufacturing — makes a token
7. Mirrorworks — makes a token

an artifact enters the battlefield — 4,643 cards in the game can cause this (Twinning Glass is one).

When Twinning Glass 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 — makes each opponent lose 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

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

anything enters the battlefield — 26,499 cards in the game can cause this (Twinning Glass is one).

When Twinning Glass enters:

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

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

anything is cast — 31,128 cards in the game can cause this (Twinning Glass is one).

When a spell is cast thanks to Twinning Glass:

1. Sokka, Bold Boomeranger — puts a +1/+1 counter on itself
2. Captain Jean-Luc Picard — makes a token
3. Windrider Wizard — draws you 1 card
4. Relic Amulet — puts a charge counter on itself
5. Rockslide Sorcerer — deals 1 damage
6. Umara Wizard // Umara Skyfalls — grants flying
7. Alania, Divergent Storm — makes an opponent draw 1 card
8. Umara Mystic — gets +2/+0
9. Saheeli, Radiant Creator — puts a counter on a permanent you control
10. Master of Winds — triggers

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