Urza, Lord Protector

the other half of its meld pair — 1 card in Urza's colors can cause this (Urza is one).

1. The Mightstone and Weakstone — Urza, Lord Protector and The Mightstone and Weakstone meld together

a nontoken artifact is exiled — 187 cards in Urza's colors can cause this (Urza is one).

1. Slagstone Refinery — When an artifact is exiled thanks to Urza, Lord Protector, Slagstone Refinery makes a token

an Artificer enters the battlefield — 154 cards in Urza's colors can cause this (Urza is one).

1. Inventor's Goggles — When Urza, Lord Protector enters, Inventor's Goggles triggers

a planeswalker enters the battlefield — 131 cards in Urza's colors can cause this (Urza is one).

1. Liliana the Faultless — When Urza, Lord Protector enters, Liliana the Faultless gains you 1 life
2. Builder's Talent — When a planeswalker enters thanks to Urza, Lord Protector, Builder's Talent puts a counter on a creature
3. Cloudstone Curio — When a planeswalker enters thanks to Urza, Lord Protector, Cloudstone Curio triggers

a Human enters the battlefield — 2,002 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector enters:

1. Thalia's Lieutenant — puts a +1/+1 counter on itself
2. Champion of the Parish — puts a +1/+1 counter on itself
3. Captain of the Mists — untaps itself
4. Beregond of the Guard — gives +1/+1
5. Lossarnach Captain — taps a creature an opponent controls

a creature attacks — 6,349 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector 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. Glory Bearers — gives +0/+1
7. Saw — sacrifices a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Super-Soldier Serum — triggers
10. Throwing Knife — sacrifices itself

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

anything attacks — 6,349 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Surgical Suite // Hospital Room — puts a counter on a creature
3. Madame Web, Clairvoyant — mills a card
4. Apothecary White — makes a token
5. Adeline, Resplendent Cathar — makes a token
6. Dalkovan Encampment — makes 2 tokens
7. Salvation Colossus — gives +2/+2
8. Guide of Souls — triggers
9. Gossip's Talent — triggers
10. Warren Warleader — triggers

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

a creature blocks — 6,349 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector blocks:

1. Barrow-Blade — strips abilities
2. Noble Stand — gains you 2 life
3. Battle Cry — gives +0/+1
4. Dead-Iron Sledge — kills a creature
5. Dwindle — kills a creature
6. Shield of the Righteous — triggers

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

a nontoken creature attacks — 6,349 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector attacks:

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

a creature deals combat damage — 6,349 cards in Urza's colors can cause this (Urza is one).

1. Antagonist Incorporator — When Urza, Lord Protector deals combat damage, Antagonist Incorporator makes a token

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

a creature is cast — 6,370 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector is cast:

1. God-Eternal Oketra — makes a token
2. Oketra's Monument — makes a token
3. The Clone Saga — copies a spell
4. Quest for the Holy Relic — puts a quest counter on itself
5. Oltec Matterweaver — triggers
6. Pure Reflection — kills a Reflection
7. Bygone Bishop — triggers
8. Flickering Hound — flickers a creature you control
9. Hazoret's Monument — draws and discards
10. Aether Barrier — makes a player sacrifice a permanent

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

a nontoken creature enters the battlefield — 6,535 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector enters:

1. Angelic Sell-Sword — makes a token
2. Arni, Humble Scribe — untaps itself
3. Saradoc, Master of Buckland — makes a token
4. Spirit Bonds — makes a token
5. Metastatic Evangel — proliferates
6. Minion Reflector — makes a token
7. Radiant Solar — triggers
8. Anafenza, Kin-Tree Spirit — puts a counter on a permanent

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

a creature enters the battlefield — 7,093 cards in Urza's colors can cause this (Urza is one).

When Urza, Lord Protector enters:

1. Ray Fillet, Wave Warrior — puts a counter on itself
2. Aetherstorm Roc — puts a counter on a permanent you control

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

anything enters the battlefield — 10,721 cards in Urza's colors can cause this (Urza is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Urza, Lord Protector enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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