Tracker

a creature deals noncombat damage — 1,420 cards in the game can cause this (Tracker is one).

When Tracker deals noncombat damage:

1. Soul Link — gains you that much life
2. Tandem Lookout — draws you 1 card
3. Armadillo Cloak — gains you that much life
4. Vampiric Link — gains you that much life
5. Spirit Loop — gains you that much life
6. Spirit Link — gains you that much life
7. Guilty Conscience — deals that much damage
8. Visions of Brutality — makes a player lose life equal to that much
9. Arm with Aether — triggers

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

anything deals noncombat damage — 3,068 cards in the game can cause this (Tracker is one).

When Tracker deals noncombat damage:

1. Quest for Pure Flame — puts a quest counter on itself
2. Soul-Scar Mage — puts that many counters on a permanent
3. Fear of Burning Alive — deals that amount damage
4. Niv-Mizzet, Visionary — draws you that many cards
5. Chandra's Incinerator — deals that much damage
6. Chandra's Pyreling — gets +1/+0
7. Talon of Pain — puts a charge counter on itself
8. Asgardian Inspiration — returns itself from the graveyard
9. Thor, Guardian of Midgard — exiles a card from your library
10. Virtue of Courage // Embereth Blaze — exiles a card from your library

36 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 (Tracker is one).

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

When Tracker attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

111 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 (Tracker is one).

When Tracker attacks:

1. Anthem of Rakdos — gives +2/+0
2. Adaptive Omnitool — searches a library
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

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

a creature blocks — 17,934 cards in the game can cause this (Tracker is one).

1. Mage Hunters' Onslaught — When Tracker blocks, Mage Hunters' Onslaught makes a player lose 1 life
2. Tide of War — When Tracker blocks, Tide of War sacrifices a creature
3. Dead-Iron Sledge — When Tracker blocks, Dead-Iron Sledge kills a creature
4. Dwindle — When Tracker blocks, Dwindle kills a creature

24 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 (Tracker is one).

1. Slash, Reptile Rampager — When Tracker enters, Slash, Reptile Rampager deals 2 damage
2. Ray Fillet, Wave Warrior — When Tracker enters, Ray Fillet, Wave Warrior puts a counter on itself
3. The Neutrinos — When Tracker enters, The Neutrinos gets +1/+0
4. Wingnut, Bat on the Belfry — When Tracker enters, Wingnut, Bat on the Belfry grants flying, haste and menace
5. Aetherstorm Roc — When Tracker enters, Aetherstorm Roc puts a counter on a permanent you control
6. Raphael, Most Attitude — When Tracker enters, Raphael, Most Attitude exiles a card from your library

303 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 (Tracker is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Tracker enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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