Tunnel Surveyor

a Detective enters the battlefield — 148 cards in the game can cause this (Tunnel Surveyor is one).

When Tunnel Surveyor enters:

1. Case of the Pilfered Proof — puts a counter on a permanent
2. Projektor Inspector — draws you 1 card
3. Perimeter Enforcer — gets +1/+1

provide a creature to sacrifice — 2,720 cards in the game can cause this.

1. Jalira, Master Polymorphist — Tunnel Surveyor makes fodder for Jalira, Master Polymorphist
2. Polymorph — Tunnel Surveyor makes fodder for Polymorph
3. Proteus Staff — Tunnel Surveyor makes fodder for Proteus Staff
4. Synthetic Destiny — Tunnel Surveyor makes fodder for Synthetic Destiny
5. Mass Polymorph — Tunnel Surveyor makes fodder for Mass Polymorph

2,715 other cards cause it too. These are the ones with the most connections.

a creature token enters the battlefield — 2,799 cards in the game can cause this (Tunnel Surveyor is one).

When a Glimmer enters thanks to Tunnel Surveyor:

1. Securitron Squadron — puts a counter on a permanent
2. Anointer Priest — gains you 1 life
3. Nesting Dovehawk — puts a +1/+1 counter on itself

a creature token is created — 2,799 cards in the game can cause this (Tunnel Surveyor is one).

1. Staff of the Storyteller — When Tunnel Surveyor makes a Glimmer token, Staff of the Storyteller puts a story counter on itself

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

a token enters the battlefield — 3,710 cards in the game can cause this (Tunnel Surveyor is one).

When a Glimmer enters thanks to Tunnel Surveyor:

1. Baron Bertram Graywater — makes a token
2. Marneus Calgar — draws you 1 card
3. Belladonna Took — gains you 1 life
4. Kambal, Profiteering Mayor — makes each opponent lose 1 life
5. Lucy MacLean, Positively Armed — makes a token
6. Mister Fantastic, Reed Richards — draws you 1 card
7. Cloakwood Swarmkeeper — puts a +1/+1 counter on itself
8. Woodland Champion — puts that many +1/+1 counters on itself
9. Leonardo, the Balance — puts a counter on a creature
10. Spiritcall Enthusiast // Scrollboost — becomes prepared

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

a token is created — 3,711 cards in the game can cause this (Tunnel Surveyor is one).

When Tunnel Surveyor makes a Glimmer token:

1. Akim, the Soaring Wind — makes a token
2. Idol of Oblivion — draws you 1 card
3. Rosie Cotton of South Lane — puts a counter on a permanent
4. Mirkwood Bats — makes each opponent lose 1 life

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

an enchantment enters the battlefield — 3,743 cards in the game can cause this (Tunnel Surveyor is one).

When a Glimmer enters thanks to Tunnel Surveyor:

1. Calix, Guided by Fate — puts a counter on a creature
2. Elvish Archivist — draws you 1 card
3. Victor, Valgavoth's Seneschal — surveils
4. Strength from the Fallen — gives +X/+X, where X is the number of creature cards in your graveyard
5. Doomwake Giant — shrinks a creature by -1/-1
6. Cacophony Unleashed — turns something into a creature
7. Ghostly Dancers — makes a token
8. Thassa's Devourer — mills a card
9. Killian, Decisive Mentor — taps a creature
10. Thoughtrender Lamia — makes an opponent discard a card

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

a Human enters the battlefield — 4,639 cards in the game can cause this (Tunnel Surveyor is one).

When Tunnel Surveyor enters:

1. General Kudro of Drannith — hits a graveyard
2. Heronblade Elite — puts a +1/+1 counter on itself
3. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
4. Thalia's Lieutenant — puts a +1/+1 counter on itself
5. Champion of the Parish — puts a +1/+1 counter on itself
6. Captain of the Mists — untaps itself
7. Erkenbrand, Lord of Westfold — gives +1/+0
8. Beregond of the Guard — gives +1/+1
9. Théoden, King of Rohan — grants double strike
10. Lossarnach Captain — taps a creature an opponent controls

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

anything attacks — 17,934 cards in the game can cause this (Tunnel Surveyor is one).

When Tunnel Surveyor attacks:

1. Within Range — makes each opponent lose life
2. Sparring Regimen — puts a counter on a creature
3. Far Fortune, End Boss — deals 1 damage
4. Temmet, Naktamun's Will — draws you 1 card
5. Campsite Cuisine — sacrifices a Food
6. Obsessive Pursuit — makes you lose life
7. Invisible Woman — triggers
8. Caesar, Legion's Emperor — sacrifices a creature
9. Guide of Souls — triggers

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

a creature attacks — 17,934 cards in the game can cause this (Tunnel Surveyor is one).

When Tunnel Surveyor attacks:

1. Adaptive Omnitool — searches a library
2. Saw — sacrifices a creature

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

a creature is cast — 18,010 cards in the game can cause this (Tunnel Surveyor is one).

1. Communal Brewing — When Tunnel Surveyor is cast, it arrives with counters thanks to Communal Brewing

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

a creature enters the battlefield — 19,800 cards in the game can cause this (Tunnel Surveyor is one).

1. Airbender Ascension — When a Glimmer enters thanks to Tunnel Surveyor, Airbender Ascension puts a quest counter on itself
2. Slash, Reptile Rampager — When a Glimmer enters thanks to Tunnel Surveyor, Slash, Reptile Rampager deals 2 damage
3. Ray Fillet, Wave Warrior — When Tunnel Surveyor enters, Ray Fillet, Wave Warrior puts a counter on itself
4. The Neutrinos — When a Glimmer enters thanks to Tunnel Surveyor, The Neutrinos gets +1/+0
5. Aetherstorm Roc — When a Glimmer enters thanks to Tunnel Surveyor, Aetherstorm Roc puts a counter on a permanent you control
6. Raphael, Most Attitude — When a Glimmer enters thanks to Tunnel Surveyor, Raphael, Most Attitude exiles a card from your library

354 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 (Tunnel Surveyor is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Glimmer enters thanks to Tunnel Surveyor, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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