Knuckles the Echidna

a Warrior creature enters the battlefield — 408 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

1. Obsidian Battle-Axe — When Knuckles the Echidna enters, Obsidian Battle-Axe triggers

a Warrior creature it grants types to — 407 cards in Knuckles the Echidna's colors can cause this.

1. Warrior's Sword — Warrior's Sword gives Knuckles the Echidna an extra creature type

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

a token is created — 757 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

1. Idol of Oblivion — When Knuckles the Echidna makes a Treasure token, Idol of Oblivion draws you 1 card

an artifact it grants types to — 2,670 cards in Knuckles the Echidna's colors can cause this.

1. Silverskin Armor — Silverskin Armor gives Knuckles the Echidna an extra creature type

2,669 other cards cause it too. These are the ones with the most connections.

an artifact enters the battlefield — 2,684 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When a Treasure enters thanks to Knuckles the Echidna:

1. Hedron Detonator — deals 1 damage
2. Machinesmith Automaton — puts a +1/+1 counter on itself
3. Oreplate Pangolin — puts a +1/+1 counter on itself
4. Arcbound Crusher — puts a +1/+1 counter on itself
5. Towashi Songshaper — gets +1/+0
6. Battered Golem — untaps itself
7. Dragonspark Reactor — puts a charge counter on itself
8. Grinding Station — untaps itself
9. Reckless Fireweaver — deals 1 damage
10. Quicksmith Genius — draws and discards

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

a creature attacks — 3,451 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna attacks:

1. Adaptive Omnitool — searches a library
2. Staff of Titania — makes a token
3. Inquisitorial Rosette — makes a token
4. Andúril, Flame of the West — makes 2 tokens
5. Saw — sacrifices a creature
6. Ultima Weapon — kills a creature an opponent controls
7. Total War — kills a creature
8. The Spear of Leonidas — triggers
9. Norin the Wary — flickers itself
10. Throwing Knife — sacrifices itself

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

a creature blocks — 3,451 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna blocks:

1. Barrow-Blade — strips abilities
2. Heat of Battle — deals 1 damage
3. Battle Strain — deals 1 damage
4. Tide of War — sacrifices a creature
5. Dead-Iron Sledge — kills a creature

1 other card cares about it too. These are the ones with the most connections.

anything attacks — 3,451 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Misty Mountains Raider — puts 2 counters on a Goblin or Army
3. Razorkin Hordecaller — makes a token
4. War Effort — makes a token
5. Inti, Seneschal of the Sun — triggers
6. Gut, True Soul Zealot — sacrifices a creature or artifact
7. Cool but Rude — draws and discards
8. Swashbuckler Extraordinaire — sacrifices a Treasure
9. Puppet Master, String Puller — triggers
10. Phyrexian Ironworks — puts a counter on a permanent you control

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

a creature deals combat damage — 3,451 cards in Knuckles the Echidna's colors can cause this.

When Knuckles the Echidna deals combat damage:

1. Embermaw Hellion — adds 1 to the damage
2. Torbran, Thane of Red Fell — adds 2 to the damage

3,449 other cards cause it too. These are the ones with the most connections.

a creature is cast — 3,468 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna is cast:

1. Summon: Brynhildr — grants haste
2. Oketra's Monument — makes a token
3. Bontu's Monument — makes each opponent lose 1 life
4. Vanquisher's Banner — draws you 1 card
5. Rhonas's Monument — gives +2/+2
6. Kumano Faces Kakkazan // Etching of Kumano — it arrives with counters thanks to Kumano Faces Kakkazan // Etching of Kumano
7. Furious Assault — deals 1 damage
8. Hazoret's Monument — draws and discards
9. Kefnet's Monument — triggers
10. Onslaught — taps a creature

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

a nontoken creature enters the battlefield — 3,511 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna enters:

1. Minion Reflector — makes a token
2. Molten Echoes — makes a token
3. Flameshadow Conjuring — makes a token
4. Mirror March — flips a coin

a creature enters the battlefield — 3,801 cards in Knuckles the Echidna's colors can cause this (Knuckles the Echidna is one).

When Knuckles the Echidna enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Wingnut, Bat on the Belfry — grants flying, haste and menace
4. Blasting Station — untaps itself
5. General Kreat, the Boltbringer — deals 1 damage
6. Raphael, Most Attitude — exiles a card from your library
7. Mogg Bombers — sacrifices itself
8. Flame-Kin War Scout — sacrifices itself
9. Monkey Cage — sacrifices itself

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