Loot, the Key to Everything

a Beast creature is cast — 451 cards in Loot's colors can cause this (Loot is one).

1. Tawnos, the Toymaker — When Loot, the Key to Everything is cast, Tawnos, the Toymaker copies a spell

a Beast enters the battlefield — 490 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything enters:

1. Totem Speaker — gains you 3 life
2. Wirewood Savage — draws you 1 card
3. Woodland Liege — draws you 1 card
4. Aether Charge — deals 4 damage

a creature attacks — 9,684 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Screaming Swarm — mills a card
4. Imperious Mindbreaker — mills a card
5. Staff of Titania — makes a token
6. Saw — sacrifices a creature
7. Ultima Weapon — kills a creature an opponent controls
8. Total War — kills a creature
9. The Spear of Leonidas — triggers
10. Norin the Wary — flickers itself

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

anything attacks — 9,684 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Bonny Pall, Clearcutter — draws you 1 card
4. Campsite Cuisine — sacrifices a Food
5. Gossip's Talent — triggers
6. Toph, Earthbending Master — puts a counter on a permanent
7. Inti, Seneschal of the Sun — triggers
8. Gut, True Soul Zealot — sacrifices a creature or artifact
9. Cool but Rude — draws and discards
10. Swashbuckler Extraordinaire — sacrifices a Treasure

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

a creature blocks — 9,684 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Favor of the Woods — gains you 3 life
5. Gift of the Woods — gives +0/+3
6. Noxious Assault — puts a counter on a permanent
7. Ferocity — puts a counter on a permanent
8. Tide of War — sacrifices a creature
9. Dead-Iron Sledge — kills a creature
10. Dwindle — kills a creature

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

a creature is cast — 9,731 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything is cast:

1. Primeval Bounty — makes a token
2. Dancing from Dark to Dawn — puts that spell's mana value counters on a creature
3. Summon: Fenrir — it arrives with counters thanks to Summon: Fenrir
4. Summon: Brynhildr — grants haste
5. Eshki, Temur's Roar — puts a +1/+1 counter on itself
6. Mona Lisa, Ever Adaptable — makes a token
7. Herald of Ilharg — puts 2 +1/+1 counters on itself
8. Champions of the Perfect — draws you 1 card
9. Masked Admirers — returns itself from the graveyard
10. Silverback Elder — triggers

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

a nontoken creature enters the battlefield — 9,856 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything enters:

1. Riku of Two Reflections — makes a token
2. Dual Nature — makes a token
3. Arni, Humble Scribe — untaps itself
4. Bramble Sovereign — makes a token
5. Soul of the Harvest — draws you 1 card
6. Surrak and Goreclaw — puts a counter on a permanent
7. Rocksteady, Mutant Marauder — puts a counter on a creature
8. Lonis, Cryptozoologist — triggers
9. Warden of the Grove — triggers

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

a creature enters the battlefield — 10,588 cards in Loot's colors can cause this (Loot is one).

When Loot, the Key to Everything 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. Wingnut, Bat on the Belfry — grants flying, haste and menace
6. Raphael, Most Attitude — exiles a card from your library

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