Forerunner of the Legion

a Vampire attacks — 484 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion attacks:

1. Glass-Cast Heart — makes a token
2. Sanctum Seeker — makes each opponent lose 1 life

a nontoken Vampire attacks — 484 cards in the game can cause this (Forerunner of the Legion is one).

1. Mavren Fein, Dusk Apostle — When Forerunner of the Legion attacks, Mavren Fein, Dusk Apostle makes a token

a Vampire creature is cast — 484 cards in the game can cause this (Forerunner of the Legion is one).

1. Bloodlord of Vaasgoth — When Forerunner of the Legion is cast, Bloodlord of Vaasgoth grants bloodthirst

a Vampire deals combat damage — 484 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion deals combat damage:

1. Rakish Heir — puts a counter on a permanent
2. Stensia Masquerade — puts a counter on a permanent

a Vampire enters the battlefield — 500 cards in the game can cause this.

1. Anje, Maid of Dishonor — When Forerunner of the Legion enters, Anje, Maid of Dishonor makes a token
2. Welcoming Vampire — When Welcoming Vampire enters, Forerunner of the Legion gives +1/+1
3. Bishop of Rebirth — When Bishop of Rebirth enters, Forerunner of the Legion gives +1/+1
4. Elenda's Hierophant — When a Vampire enters thanks to Elenda's Hierophant, Forerunner of the Legion gives +1/+1
5. Famished Paladin — When Famished Paladin enters, Forerunner of the Legion gives +1/+1
6. Glorifier of Suffering — When Glorifier of Suffering enters, Forerunner of the Legion gives +1/+1
7. Vanguard of the Rose — When Vanguard of the Rose enters, Forerunner of the Legion gives +1/+1
8. Sanguine Evangelist — When Sanguine Evangelist enters, Forerunner of the Legion gives +1/+1
9. Charismatic Conqueror — When a Vampire enters thanks to Charismatic Conqueror, Forerunner of the Legion gives +1/+1
10. Martyr of Dusk — When a Vampire enters thanks to Martyr of Dusk, Forerunner of the Legion gives +1/+1
11. Paladin of the Bloodstained — When a Vampire enters thanks to Paladin of the Bloodstained, Forerunner of the Legion gives +1/+1
12. Markov Enforcer — When Forerunner of the Legion enters, Markov Enforcer deals damage
13. Evelyn, the Covetous — When Forerunner of the Legion enters, Evelyn, the Covetous exiles a card from a library

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

a Knight attacks — 547 cards in the game can cause this (Forerunner of the Legion is one).

1. Knights' Charge — When Forerunner of the Legion attacks, Knights' Charge makes each opponent lose 1 life

a Knight deals combat damage — 547 cards in the game can cause this (Forerunner of the Legion is one).

1. Exsanguinator Cavalry — When Forerunner of the Legion deals combat damage, Exsanguinator Cavalry puts a counter on a permanent

a Knight enters the battlefield — 592 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion enters:

1. Brimstone Trebuchet — untaps itself
2. Zhalfirin Lancer — gets +1/+1

anything attacks — 17,934 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion 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 (Forerunner of the Legion is one).

When Forerunner of the Legion 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

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 (Forerunner of the Legion is one).

When Forerunner of the Legion blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

18 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 (Forerunner of the Legion is one).

When Forerunner of the Legion attacks:

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

a creature deals combat damage — 17,934 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion deals combat damage:

1. Locutus of Borg — makes a token
2. Antagonist Incorporator — makes a token
3. Hive Mind Coprocessor — makes you lose life

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

a creature is cast — 18,010 cards in the game can cause this (Forerunner of the Legion is one).

When Forerunner of the Legion is cast:

1. Primeval Bounty — makes a token
2. Bloodbond March — brings a card back
3. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
4. Endrek Sahr, Master Breeder — makes that spell's mana value tokens

87 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 (Forerunner of the Legion is one).

When Forerunner of the Legion enters:

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

305 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 (Forerunner of the Legion is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Forerunner of the Legion enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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