Ratcatcher Trainee // Pest Problem

an Adventure instant is cast — 61 cards in the game can cause this (Ratcatcher Trainee is one).

1. Lucky Clover — When Ratcatcher Trainee // Pest Problem is cast, Lucky Clover copies a spell

a Rat enters the battlefield — 186 cards in the game can cause this (Ratcatcher Trainee is one).

When a Rat enters thanks to Ratcatcher Trainee // Pest Problem:

1. Wick, the Whorled Mind — makes a token
2. Lord Skitter, Sewer King — hits a graveyard

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

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

1. Industrial Advancement — Ratcatcher Trainee // Pest Problem makes fodder for Industrial Advancement
2. Divergent Transformations — Ratcatcher Trainee // Pest Problem makes fodder for Divergent Transformations
3. Transmogrify — Ratcatcher Trainee // Pest Problem makes fodder for Transmogrify

2,717 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 (Ratcatcher Trainee is one).

When a Rat enters thanks to Ratcatcher Trainee // Pest Problem:

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 (Ratcatcher Trainee is one).

1. Staff of the Storyteller — When Ratcatcher Trainee // Pest Problem makes a Rat 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 (Ratcatcher Trainee is one).

When a Rat enters thanks to Ratcatcher Trainee // Pest Problem:

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 (Ratcatcher Trainee is one).

When Ratcatcher Trainee // Pest Problem makes a Rat 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 instant is cast — 3,931 cards in the game can cause this (Ratcatcher Trainee is one).

When Ratcatcher Trainee // Pest Problem is cast:

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. Lilah, Undefeated Slickshot — gets +1/+1
7. Gale, Waterdeep Prodigy — brings a card back
8. Harness the Storm — brings a card back
9. In the Eye of Chaos — counters a spell
10. Niblis of Frost — taps a creature an opponent controls

427 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 (Ratcatcher Trainee is one).

When Ratcatcher Trainee // Pest Problem 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 (Ratcatcher Trainee is one).

When Ratcatcher Trainee // Pest Problem attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Invisible Woman — triggers
4. Caesar, Legion's Emperor — sacrifices a creature
5. Guide of Souls — triggers
6. Campsite Cuisine — sacrifices a Food
7. Gossip's Talent — triggers

130 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 (Ratcatcher Trainee is one).

When Ratcatcher Trainee // Pest Problem attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Saw — sacrifices a creature

206 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 (Ratcatcher Trainee is one).

1. Tide of War — When Ratcatcher Trainee // Pest Problem blocks, Tide of War sacrifices a creature

29 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 (Ratcatcher Trainee is one).

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

351 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 (Ratcatcher Trainee is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Rat enters thanks to Ratcatcher Trainee // Pest Problem, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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