Berta, Wise Extrapolator

a Frog attacks — 135 cards in the game can cause this (Berta is one).

1. Grolnok, the Omnivore — When Berta, Wise Extrapolator attacks, Grolnok, the Omnivore mills a card

a Frog enters the battlefield — 140 cards in the game can cause this (Berta is one).

1. Valley Mightcaller — When Berta, Wise Extrapolator enters, Valley Mightcaller puts a +1/+1 counter on itself

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

1. Jalira, Master Polymorphist — Berta, Wise Extrapolator makes fodder for Jalira, Master Polymorphist
2. Polymorph — Berta, Wise Extrapolator makes fodder for Polymorph
3. Birthing Ritual — Berta, Wise Extrapolator makes fodder for Birthing Ritual
4. Proteus Staff — Berta, Wise Extrapolator makes fodder for Proteus Staff
5. Synthetic Destiny — Berta, Wise Extrapolator makes fodder for Synthetic Destiny
6. Mass Polymorph — Berta, Wise Extrapolator makes fodder for Mass Polymorph

2,714 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 (Berta is one).

When a Fractal enters thanks to Berta, Wise Extrapolator:

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 (Berta is one).

1. Staff of the Storyteller — When Berta, Wise Extrapolator makes a Fractal 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 (Berta is one).

When a Fractal enters thanks to Berta, Wise Extrapolator:

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 (Berta is one).

When Berta, Wise Extrapolator makes a Fractal 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.

anything gets a counter — 4,415 cards in the game can cause this.

1. All Will Be One — When a permanent gets a counter thanks to Berta, Wise Extrapolator, All Will Be One deals that much damage
2. Defiler of Vigor — When Berta, Wise Extrapolator gets a counter thanks to Defiler of Vigor, it adds 1 mana
3. Surrak and Goreclaw — When Berta, Wise Extrapolator gets a counter thanks to Surrak and Goreclaw, it adds 1 mana
4. Danny Pink — When Berta, Wise Extrapolator gets a counter thanks to Danny Pink, it adds 1 mana
5. The Earth Crystal — When Berta, Wise Extrapolator gets a counter thanks to The Earth Crystal, it adds 1 mana
6. Metallic Mimic — When Berta, Wise Extrapolator gets a counter thanks to Metallic Mimic, it adds 1 mana
7. Renata, Called to the Hunt — When Berta, Wise Extrapolator gets a counter thanks to Renata, Called to the Hunt, it adds 1 mana
8. Earthbending Student — When Berta, Wise Extrapolator gets a counter thanks to Earthbending Student, it adds 1 mana
9. Tromell, Seymour's Butler — When Berta, Wise Extrapolator gets a counter thanks to Tromell, Seymour's Butler, it adds 1 mana
10. Workshop Elders — When Berta, Wise Extrapolator gets a counter thanks to Workshop Elders, it adds 1 mana
11. Coin of Mastery — When Berta, Wise Extrapolator gets a counter thanks to Coin of Mastery, it adds 1 mana
12. Lonis, Genetics Expert — When Lonis, Genetics Expert gets a counter thanks to Berta, Wise Extrapolator, it triggers

10 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 (Berta is one).

When Berta, Wise Extrapolator 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

122 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 (Berta is one).

When Berta, Wise Extrapolator attacks:

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

194 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 (Berta is one).

When Berta, Wise Extrapolator blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Tide of War — sacrifices a creature
4. Dead-Iron Sledge — kills a creature
5. Dwindle — kills a creature
6. Shield of the Righteous — triggers

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

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

When Berta, Wise Extrapolator attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

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

1. Slash, Reptile Rampager — When a Fractal enters thanks to Berta, Wise Extrapolator, Slash, Reptile Rampager deals 2 damage
2. Gimli of the Glittering Caves — When Berta, Wise Extrapolator enters, Gimli of the Glittering Caves puts counters on a permanent
3. Ray Fillet, Wave Warrior — When Berta, Wise Extrapolator enters, Ray Fillet, Wave Warrior puts a counter on itself
4. Legolas Greenleaf — When Berta, Wise Extrapolator enters, Legolas Greenleaf puts a counter on a permanent
5. The Neutrinos — When a Fractal enters thanks to Berta, Wise Extrapolator, The Neutrinos gets +1/+0
6. Wingnut, Bat on the Belfry — When a Fractal enters thanks to Berta, Wise Extrapolator, Wingnut, Bat on the Belfry grants flying, haste and menace
7. Aetherstorm Roc — When a Fractal enters thanks to Berta, Wise Extrapolator, Aetherstorm Roc puts a counter on a permanent you control
8. Raphael, Most Attitude — When a Fractal enters thanks to Berta, Wise Extrapolator, Raphael, Most Attitude exiles a card from your library

331 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 (Berta is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a Fractal enters thanks to Berta, Wise Extrapolator, 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.