Grand Arbiter Augustin IV

a planeswalker it makes cheaper to cast — 95 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

1. Invasion of New Phyrexia // Teferi Akosa of Zhalfir — Grand Arbiter Augustin IV reduces what Invasion of New Phyrexia // Teferi Akosa of Zhalfir costs

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

a sorcery it makes cheaper to cast — 954 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

Grand Arbiter Augustin IV reduces what:

1. Sram's Expertise — costs
2. Relm's Sketching — costs

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

an instant it makes cheaper to cast — 1,657 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

1. Intrude on the Mind — Grand Arbiter Augustin IV reduces what Intrude on the Mind costs

1,656 other cards care about it too. These are the ones with the most connections.

an artifact it makes cheaper to cast — 3,047 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

Grand Arbiter Augustin IV reduces what:

1. Urza, Planeswalker — costs
2. Summon: Yojimbo — costs
3. White Sun's Twilight — costs
4. Phyrexian Rebirth — costs
5. Join the Collective — costs
6. Of Herbs and Stewed Rabbit — costs
7. The Birth of Meletis — costs
8. Three Steps Ahead — costs
9. Vault 101: Birthday Party — costs
10. The Eleventh Hour — costs

3,037 other cards care about it too. These are the ones with the most connections.

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

When Grand Arbiter Augustin IV 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 Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

When Grand Arbiter Augustin IV 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

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

anything attacks — 6,349 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

When Grand Arbiter Augustin IV 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

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

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

When Grand Arbiter Augustin IV 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

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

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

When Grand Arbiter Augustin IV attacks:

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

a creature it makes cheaper to cast — 6,940 cards in Grand Arbiter Augustin IV's colors can cause this (Grand Arbiter Augustin IV is one).

Grand Arbiter Augustin IV reduces what:

1. Extravagant Replication — costs
2. Thopter Spy Network — costs
3. Dovin, Grand Arbiter — costs
4. Metallurgic Summonings — costs
5. Urza's Command — costs
6. Elesh Norn // The Argent Etchings — costs
7. Mirrodin Besieged — costs
8. Conquest Mission — costs
9. Efficient Construction — costs
10. Invasion of Theros // Ephara, Ever-Sheltering — costs

6,929 other cards care about it too. These are the ones with the most connections.

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

When Grand Arbiter Augustin IV enters:

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

1,210 other cards care about it too. These are the ones with the most connections.

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

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Grand Arbiter Augustin IV enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

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