Captain Howler, Sea Scourge

a Pirate attacks — 145 cards in Captain Howler's colors can cause this (Captain Howler is one).

1. Breeches, Eager Pillager — When Captain Howler, Sea Scourge attacks, Breeches, Eager Pillager triggers

a Pirate enters the battlefield — 149 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge enters:

1. Gemcutter Buccaneer — makes a token
2. Merchant Raiders — taps a creature
3. Coercive Recruiter — untaps a creature

discard a card — 910 cards in Captain Howler's colors can cause this.

1. Master of Winds — When Master of Winds makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
2. Sokka, Bold Boomeranger — When Sokka, Bold Boomeranger makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
3. Windrider Wizard — When Windrider Wizard makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
4. Sage of the Falls — When Sage of the Falls makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
5. Irreverent Gremlin — When Irreverent Gremlin makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
6. The Flame of Keld — When The Flame of Keld makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
7. Dragon Wings — When Dragon Wings makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
8. Teo, Spirited Glider — When Teo, Spirited Glider makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
9. The Destined Thief — When The Destined Thief makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way
10. Pyrewild Shaman — When Pyrewild Shaman makes a player discard a card, Captain Howler, Sea Scourge gives +2/+0 for each card discarded this way

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

life is lost — 1,408 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge makes a player lose life:

1. Marina Vendrell's Grimoire — triggers
2. Lich's Tomb — sacrifices a permanent

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

a card is drawn — 1,924 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge makes a player draw a card:

1. Aether Syphon — mills a card
2. Niv-Mizzet, Parun — deals 1 damage
3. The Locust God — makes a token
4. Diviner's Wand — gets +1/+1
5. Ominous Seas — puts a foreshadow counter on itself
6. Iron Man, Armored Avenger — puts a counter on a creature
7. Psychosis Crawler — makes each opponent lose 1 life
8. Lyla, Holographic Assistant — puts a counter on a creature
9. Data, New Life — puts a +1/+1 counter on itself
10. Chasm Skulker — puts a +1/+1 counter on itself

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

a creature attacks — 6,189 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge 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

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

a creature blocks — 6,189 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge 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
6. Dwindle — kills a creature

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

anything attacks — 6,189 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Shaun, Father of Synths — makes a token
4. Misty Mountains Raider — puts 2 counters on a Goblin or Army
5. Razorkin Hordecaller — makes a token
6. Gossip's Talent — triggers
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

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

a creature is cast — 6,218 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge is cast:

1. Summon: Brynhildr — grants haste
2. Oketra's Monument — makes a token
3. Kozilek's Unsealing — makes 2 tokens
4. The Clone Saga — copies a spell
5. Customs Depot — draws you 1 card
6. Bontu's Monument — makes each opponent lose 1 life
7. Vanquisher's Banner — draws you 1 card
8. Sarkhan's Unsealing — deals 4 damage
9. Hazoret's Monument — draws and discards
10. Aether Barrier — makes a player sacrifice a permanent

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

a nontoken creature enters the battlefield — 6,294 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge enters:

1. Arni, Humble Scribe — untaps itself
2. Minion Reflector — makes a token
3. Molten Echoes — makes a token

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

a creature enters the battlefield — 6,749 cards in Captain Howler's colors can cause this (Captain Howler is one).

When Captain Howler, Sea Scourge 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. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Raphael, Most Attitude — exiles a card from your library

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