Arni Metalbrow

a Berserker attacks — 214 cards in the game can cause this (Arni Metalbrow is one).

1. The Bloodsky Massacre — When Arni Metalbrow attacks, The Bloodsky Massacre draws you 1 card

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

When Arni Metalbrow 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 (Arni Metalbrow is one).

When Arni Metalbrow 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 (Arni Metalbrow is one).

When Arni Metalbrow 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

180 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 (Arni Metalbrow is one).

When Arni Metalbrow 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

22 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 (Arni Metalbrow is one).

When Arni Metalbrow 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 (Arni Metalbrow is one).

1. Fire Nation Salvagers — When Fire Nation Salvagers enters thanks to Arni Metalbrow, it puts a counter on a creature or Vehicle
2. Goblin Goliath — When Goblin Goliath enters thanks to Arni Metalbrow, it makes a token
3. Slash, Reptile Rampager — When a creature enters thanks to Arni Metalbrow, Slash, Reptile Rampager deals 2 damage
4. Gimli of the Glittering Caves — When Arni Metalbrow enters, Gimli of the Glittering Caves puts counters on a permanent
5. Ray Fillet, Wave Warrior — When Arni Metalbrow enters, Ray Fillet, Wave Warrior puts a counter on itself
6. Legolas Greenleaf — When Arni Metalbrow enters, Legolas Greenleaf puts a counter on a permanent
7. The Neutrinos — When a creature enters thanks to Arni Metalbrow, The Neutrinos gets +1/+0
8. Wingnut, Bat on the Belfry — When a creature enters thanks to Arni Metalbrow, Wingnut, Bat on the Belfry grants flying, haste and menace
9. Aetherstorm Roc — When a creature enters thanks to Arni Metalbrow, Aetherstorm Roc puts a counter on a permanent you control
10. Raphael, Most Attitude — When a creature enters thanks to Arni Metalbrow, Raphael, Most Attitude exiles a card from your library

298 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 (Arni Metalbrow is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When a creature enters thanks to Arni Metalbrow, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself
2. Ivora, Insatiable Heir — When Ivora, Insatiable Heir enters thanks to Arni Metalbrow, it makes a token
3. Dogmeat, Ever Loyal — When Dogmeat, Ever Loyal enters thanks to Arni Metalbrow, it mills a card
4. The Earth King — When The Earth King enters thanks to Arni Metalbrow, it makes a token
5. SP//dr, Piloted by Peni — When SP//dr, Piloted by Peni enters thanks to Arni Metalbrow, it puts a counter on a creature
6. Mu Yanling, Wind Rider — When Mu Yanling, Wind Rider enters thanks to Arni Metalbrow, it makes a token
7. The Rani — When The Rani enters thanks to Arni Metalbrow, it makes a token
8. Ellivere of the Wild Court — When Ellivere of the Wild Court enters thanks to Arni Metalbrow, it makes a token
9. J. Jonah Jameson — When J. Jonah Jameson enters thanks to Arni Metalbrow, it triggers
10. Ultimecia, Temporal Threat — When Ultimecia, Temporal Threat enters thanks to Arni Metalbrow, it taps a creature an opponent controls

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