Tunnel Vision

a card is milled — 772 cards in the game can cause this (Tunnel Vision is one).

1. Lo and Li, Royal Advisors — When a permanent makes a player mill a card thanks to Tunnel Vision, Lo and Li, Royal Advisors puts a counter on an Advisor

a library is searched — 982 cards in the game can cause this (Tunnel Vision is one).

When a permanent searches a library thanks to Tunnel Vision:

1. River Song — puts a +1/+1 counter on itself
2. Archivist of Oghma — gains you 1 life
3. Wan Shi Tong, Librarian — puts a +1/+1 counter on itself
4. Ob Nixilis, Unshackled — makes an opponent sacrifice a creature

a sorcery is cast — 3,720 cards in the game can cause this (Tunnel Vision is one).

When Tunnel Vision is cast:

1. Spellweaver Volute — copies a spell
2. Lilah, Undefeated Slickshot — gets +1/+1
3. Niblis of Frost — gets +1/+1
4. Primeval Bounty — puts 3 counters on a creature
5. Tetsuko Umezawa, Pursuer — gets +1/+1
6. Thor, God of Thunder — deals that spell's mana value damage
7. Krile Baldesion — brings a card back
8. Summon: Good King Mog XII — makes a token
9. Kykar, Wind's Fury — makes a token
10. Blood Funnel — sacrifices a creature

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

a card in a graveyard — 7,589 cards in the game can cause this (Tunnel Vision is one).

1. Gale, Waterdeep Prodigy — Tunnel Vision puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
2. Harness the Storm — Tunnel Vision puts cards into the graveyard that Harness the Storm can bring back
3. Samwise Gamgee — Tunnel Vision puts cards into the graveyard that Samwise Gamgee can bring back
4. Fire Nation Salvagers — Tunnel Vision puts cards into the graveyard that Fire Nation Salvagers can bring back
5. Bloodbond March — Tunnel Vision puts cards into the graveyard that Bloodbond March can bring back
6. Transplant Theorist — Tunnel Vision puts cards into the graveyard that Transplant Theorist can bring back
7. Heart-Shaped Herb — Tunnel Vision puts cards into the graveyard that Heart-Shaped Herb can bring back
8. Wayward Angel — Tunnel Vision fills your graveyard toward the 7 or more cards Wayward Angel needs
9. Rescue from the Underworld — Tunnel Vision puts cards into the graveyard that Rescue from the Underworld can bring back
10. Victimize — Tunnel Vision puts cards into the graveyard that Victimize can bring back

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Tunnel Vision is one).

When a card hits the graveyard thanks to Tunnel Vision:

1. The Haunt of Hightower — puts a +1/+1 counter on itself
2. Duskmantle Guildmage — makes each opponent lose 1 life
3. Vulturous Zombie — puts a +1/+1 counter on itself
4. Quest for Ancient Secrets — puts a quest counter on itself
5. Bloodchief Ascension — makes each opponent lose 2 life
6. Compost — draws you 1 card
7. Planar Void — hits a graveyard
8. Measure of Wickedness — gives an opponent control of itself
9. Energy Field — sacrifices itself

2 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 (Tunnel Vision is one).

When Tunnel Vision is cast:

1. Windrider Wizard — draws you 1 card
2. Relic Amulet — puts a charge counter on itself
3. Rockslide Sorcerer — deals 1 damage
4. Umara Wizard // Umara Skyfalls — grants flying
5. Alania, Divergent Storm — makes an opponent draw 1 card
6. Umara Mystic — gets +2/+0
7. Master of Winds — triggers

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