Mystery Key

an Equipment in a graveyard — 37 cards in the game can cause this (Mystery Key is one).

When Mystery Key is in the graveyard:

1. Magnetic Snuffler — can bring it back
2. Ratonhnhaké꞉ton — can bring it back
3. Nahiri, the Lithomancer — can bring it back
4. Cid, Freeflier Pilot — can bring it back
5. Auriok Survivors — can bring it back
6. Forge Anew — can bring it back

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

a nontoken Equipment enters the battlefield — 649 cards in the game can cause this (Mystery Key is one).

1. Firion, Wild Rose Warrior — When Mystery Key enters, Firion, Wild Rose Warrior makes a token

an Equipment enters the battlefield — 658 cards in the game can cause this (Mystery Key is one).

When Mystery Key enters:

1. Puresteel Paladin — draws you 1 card
2. Sokka and Suki — makes a token
3. Barret, Avalanche Leader — makes a token
4. The Mighty Thor, Jane Foster — draws you 1 card
5. Giott, King of the Dwarves — draws and discards
6. Hammer of Nazahn — triggers
7. Sigarda's Aid — triggers

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

an artifact is sacrificed — 761 cards in the game can cause this (Mystery Key is one).

When you sacrifice Mystery Key:

1. Megatron, Tyrant // Megatron, Destructive Force — deals the sacrificed artifact's mana value damage
2. Moonstone Eulogist — puts a +1/+1 counter on itself
3. Gleaming Geardrake — puts a +1/+1 counter on itself
4. Esoteric Duplicator — makes a token
5. Biotech Specialist — deals 2 damage
6. Jaws, Relentless Predator — deals 1 damage
7. Crime Novelist — puts a +1/+1 counter on itself
8. Vengeful Tracker — deals 2 damage

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

an artifact in a graveyard — 1,226 cards in the game can cause this (Mystery Key is one).

When Mystery Key is in the graveyard:

1. Loran, Disciple of History — can bring it back
2. The Emperor of Palamecia // The Lord Master of Hell — gets bigger
3. Builder's Talent — can bring it back
4. Trading Post — can bring it back
5. Tasigur, the Golden Fang — can bring it back
6. Serpent of the Pass — gets bigger
7. Emeria Shepherd — can bring it back
8. Goblin Engineer — can bring it back
9. Daretti, Rocketeer Engineer — can bring it back
10. Scrap Welder — can bring it back

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

a nontoken artifact is put into a graveyard from the battlefield — 1,226 cards in the game can cause this (Mystery Key is one).

When Mystery Key is put into a graveyard from the battlefield:

1. Pia's Revolution — deals 3 damage
2. Farid, Enterprising Salvager — makes a token
3. Psychomancer — makes each opponent lose 1 life
4. Sly Requisitioner — makes a token
5. Slagstone Refinery — makes a token
6. Ratchet, Field Medic // Ratchet, Rescue Racer — triggers

1 other card cares about it too. These are the ones with the most connections.

an artifact goes to a graveyard — 1,250 cards in the game can cause this (Mystery Key is one).

When Mystery Key hits the graveyard:

1. Ultron the Annihilator — makes each opponent lose 1 life
2. Ultron's Auxiliary — puts a +1/+1 counter on itself

an artifact is put into a graveyard from the battlefield — 1,254 cards in the game can cause this (Mystery Key is one).

When Mystery Key is put into a graveyard from the battlefield:

1. Party Dude — draws you 1 card
2. Tezzeret's Touch — brings a card back
3. Krenko, Baron of Tin Street — makes a token
4. Syr Ginger, the Meal Ender — puts a +1/+1 counter on itself
5. Shard of the Void Dragon — puts 2 +1/+1 counters on itself
6. Kibo, Uktabi Prince — puts a counter on an Ape or Monkey
7. Ich-Tekik, Salvage Splicer — puts a +1/+1 counter on itself
8. Gremlin Infestation — makes a token
9. Summoning Station — untaps itself
10. Marionette Master — makes each opponent lose life equal to this creature's power

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

an artifact leaves the battlefield — 1,680 cards in the game can cause this (Mystery Key is one).

1. Sludge Strider — When Mystery Key leaves the battlefield, Sludge Strider makes a player lose 1 life

anything is sacrificed — 3,450 cards in the game can cause this (Mystery Key is one).

1. Gorbag of Minas Morgul — When you sacrifice Mystery Key, Gorbag of Minas Morgul triggers

3 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 (Mystery Key is one).

When Mystery Key is cast:

1. Death to Our Enemies — makes a token
2. Mendicant Core, Guidelight — copies a spell
3. Sai, Master Thopterist — makes a token
4. Ravenous Robots — makes a token
5. Pinnacle Emissary — makes a token
6. Mirrodin Besieged — makes a token
7. Poetic Ingenuity — makes a token

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

a card is drawn — 3,815 cards in the game can cause this (Mystery Key is one).

1. Toothy, Imaginary Friend — When Mystery Key makes a player draw a card, Toothy, Imaginary Friend puts a +1/+1 counter on itself

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

an artifact it grants abilities to — 4,531 cards in the game can cause this.

1. Mm'menon, the Right Hand — Mm'menon, the Right Hand gives Mystery Key an extra ability
2. Energy Flux — Energy Flux gives Mystery Key an extra ability
3. Chief Engineer — Chief Engineer gives Mystery Key convoke
4. Darksteel Forge — Darksteel Forge gives Mystery Key indestructible
5. Encroaching Mycosynth — Encroaching Mycosynth gives Mystery Key an extra ability

4,526 other cards cause it too. These are the ones with the most connections.

an artifact it applies untap to — 4,531 cards in the game can cause this.

1. Unwinding Clock — Unwinding Clock gives Mystery Key an extra untap

4,530 other cards cause it too. These are the ones with the most connections.

an artifact it applies animate to — 4,531 cards in the game can cause this.

1. March of the Machines — March of the Machines gives Mystery Key life as a creature

4,530 other cards cause it too. These are the ones with the most connections.