Hallar, the Firefletcher

an Elf attacks — 723 cards in the game can cause this (Hallar is one).

When Hallar, the Firefletcher attacks:

1. Celeborn the Wise — scries
2. Tyvar the Bellicose — grants deathtouch
3. Harald Unites the Elves — shrinks a creature by -1/-1
4. Arboreal Alliance — triggers

a nontoken Elf enters the battlefield — 728 cards in the game can cause this (Hallar is one).

1. Wirewood Hivemaster — When Hallar, the Firefletcher enters, Wirewood Hivemaster makes a token

an Elf enters the battlefield — 752 cards in the game can cause this (Hallar is one).

When Hallar, the Firefletcher enters:

1. Wolverine Riders — gains you its toughness life
2. Elvish Warmaster — makes a token
3. Thranduil, the Elvenking — draws you 2 cards
4. Elvish Vanguard — puts a +1/+1 counter on itself
5. Marwyn, the Nurturer — puts a +1/+1 counter on itself
6. Woodland Weavemaster — gets +1/+1
7. High Perfect Morcant — puts a counter on a permanent an opponent controls
8. Maralen, Fae Ascendant — exiles a card from an opponent's library

a creature gets a counter — 2,691 cards in the game can cause this (Hallar is one).

When Hallar, the Firefletcher gets a counter:

1. Hollowmurk Siege — draws you 1 card
2. Ant-Man, Colony Commander — makes a token
3. Earth Kingdom General — gains you that much life
4. Casey Jones, Back Alley Brute — deals that much damage
5. Generous Patron — draws you 1 card
6. Shalai and Hallar — deals that much damage
7. Danny Pink — draws you 1 card
8. Enduring Scalelord — puts a +1/+1 counter on itself
9. Bold Plagiarist — puts counters on a permanent
10. Mikey & Leo, Chaos & Order — draws you 1 card

33 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 (Hallar is one).

When Hallar, the Firefletcher deals noncombat damage:

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

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

life is lost — 3,160 cards in the game can cause this (Hallar is one).

When Hallar, the Firefletcher makes a player lose life:

1. Far Fortune, End Boss — raises your speed
2. Zahur, Glory's Past — raises your speed
3. Mendicant Core, Guidelight — raises your speed
4. Aether Syphon — raises your speed
5. Vnwxt, Verbose Host — raises your speed
6. Embalmed Ascendant — raises your speed
7. Slick Imitator — raises your speed
8. Nesting Bot — raises your speed
9. Howlsquad Heavy — raises your speed
10. Hour of Victory — raises your speed

46 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 (Hallar is one).

1. All Will Be One — When Hallar, the Firefletcher gets a counter, All Will Be One deals that much damage

8 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 (Hallar is one).

When Hallar, the Firefletcher attacks:

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

187 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 (Hallar is one).

When Hallar, the Firefletcher attacks:

1. Temmet, Naktamun's Will — draws you 1 card
2. Invisible Woman — triggers
3. Caesar, Legion's Emperor — sacrifices a creature
4. Guide of Souls — triggers

123 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 (Hallar is one).

When Hallar, the Firefletcher enters:

1. Scurry Oak — puts a counter on itself
2. Fathom Mage — puts a counter on itself
3. Lonis, Genetics Expert — puts a counter on itself
4. Slash, Reptile Rampager — deals 2 damage
5. Gimli of the Glittering Caves — puts counters on a permanent
6. Ray Fillet, Wave Warrior — puts a counter on itself
7. Legolas Greenleaf — puts a counter on a permanent
8. The Neutrinos — gets +1/+0
9. Aetherstorm Roc — puts a counter on a permanent you control

304 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 (Hallar is one).

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

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