Horde of Notions

put an Elemental into a graveyard — 90 cards in Horde of Notions's colors can cause this.

1. War Elemental — When War Elemental is in the graveyard, Horde of Notions can bring it back
2. Flame-Kin War Scout — When Flame-Kin War Scout is in the graveyard, Horde of Notions can bring it back
3. Blazing Bomb — When Blazing Bomb is in the graveyard, Horde of Notions can bring it back
4. Endurance — When Endurance is in the graveyard, Horde of Notions can bring it back
5. Emptiness — When Emptiness is in the graveyard, Horde of Notions can bring it back
6. Whisperwood Elemental — When Whisperwood Elemental is in the graveyard, Horde of Notions can bring it back
7. Reveillark — When Reveillark is in the graveyard, Horde of Notions can bring it back
8. Vesperlark — When Vesperlark is in the graveyard, Horde of Notions can bring it back
9. Thunderkin Awakener — Thunderkin Awakener puts cards into the graveyard that Horde of Notions can bring back
10. Incandescent Soulstoke — Incandescent Soulstoke puts cards into the graveyard that Horde of Notions can bring back

80 other cards cause it too. These are the ones with the most connections.

an Elemental enters the battlefield — 754 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions enters:

1. Champion of the Path — deals its power damage
2. Risen Reef — puts a land onto the battlefield

anything leaves a graveyard — 2,503 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

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

anything attacks — 17,934 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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

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

a creature attacks — 17,934 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Path of Mettle // Metzali, Tower of Triumph — triggers
10. Total War — kills a creature

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

a creature blocks — 17,934 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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 Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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 Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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 Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions 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

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

a creature enters the battlefield — 19,800 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

When Horde of Notions enters:

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

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

anything enters the battlefield — 26,499 cards in Horde of Notions's colors can cause this (Horde of Notions is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Horde of Notions enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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