Isochron Scepter

an instant is copied — 87 cards in the game can cause this (Isochron Scepter is one).

When an instant is copied thanks to Isochron Scepter:

1. Kalamax, the Stormsire — puts a +1/+1 counter on itself
2. Extus, Oriq Overlord // Awaken the Blood Avatar — brings a card back
3. Storm-Kiln Artist — makes a token
4. Professor Onyx — makes each opponent lose 2 life
5. Zaffai, Thunder Conductor — scries
6. Deekah, Fractal Theorist — makes a token
7. Elemental Expressionist — grants a keyword
8. Sedgemoor Witch — makes a token
9. Jadzi, Oracle of Arcavios // Journey to the Oracle — puts a creature, artifact, enchantment, instant, sorcery, planeswalker or battle onto the battlefield
10. Ashling, Flame Dancer — draws and discards

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

anything is exiled — 2,497 cards in the game can cause this (Isochron Scepter is one).

1. The War Doctor — When an instant is exiled thanks to Isochron Scepter, The War Doctor puts a time counter on itself

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

When Isochron Scepter 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

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 (Isochron Scepter is one).

When Isochron Scepter 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 instant is cast — 3,931 cards in the game can cause this (Isochron Scepter is one).

When an instant is cast thanks to Isochron Scepter:

1. Lunar Mystic — draws you 1 card
2. Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time — grants rebound
3. Repeated Reverberation — copies an ability
4. Riku of Two Reflections — copies a spell
5. Sword of Wealth and Power — copies a spell
6. Gale, Waterdeep Prodigy — brings a card back
7. Harness the Storm — brings a card back
8. Metallurgic Summonings — makes a token
9. In the Eye of Chaos — counters a spell
10. Mica, Reader of Ruins — sacrifices an artifact

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

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

When Isochron Scepter 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

55 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 (Isochron Scepter is one).

When Isochron Scepter enters:

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

41 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 (Isochron Scepter is one).

1. Sokka, Bold Boomeranger — When Isochron Scepter is cast, Sokka, Bold Boomeranger puts a +1/+1 counter on itself
2. Windrider Wizard — When an instant is cast thanks to Isochron Scepter, Windrider Wizard draws you 1 card
3. Relic Amulet — When an instant is cast thanks to Isochron Scepter, Relic Amulet puts a charge counter on itself
4. Rockslide Sorcerer — When an instant is cast thanks to Isochron Scepter, Rockslide Sorcerer deals 1 damage
5. Umara Wizard // Umara Skyfalls — When an instant is cast thanks to Isochron Scepter, Umara Wizard // Umara Skyfalls grants flying
6. Alania, Divergent Storm — When an instant is cast thanks to Isochron Scepter, Alania, Divergent Storm makes an opponent draw 1 card
7. Umara Mystic — When an instant is cast thanks to Isochron Scepter, Umara Mystic gets +2/+0
8. Saheeli, Radiant Creator — When Isochron Scepter is cast, Saheeli, Radiant Creator puts a counter on a permanent you control
9. Master of Winds — When an instant is cast thanks to Isochron Scepter, Master of Winds triggers

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