Katara, Waterbending Master

an Ally enters the battlefield — 43 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master enters:

1. Halimar Excavator — mills a card
2. Umara Raptor — puts a +1/+1 counter on itself
3. Seascape Aerialist — grants flying

a Warrior creature enters the battlefield — 65 cards in Katara's colors can cause this (Katara is one).

1. Obsidian Battle-Axe — When Katara, Waterbending Master enters, Obsidian Battle-Axe triggers

a card is discarded — 493 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master makes a player discard a card:

1. Containment Construct — brings a card back
2. Scrounging Skyray — puts that many +1/+1 counters on itself
3. Curator of Mysteries — scries
4. All-Seeing Arbiter — shrinks a creature
5. Drake Haven — makes a token
6. Hekma Sentinels — gets +1/+1
7. Cunning Survivor — gets +1/+0
8. Zenith Seeker — grants flying
9. Currency Converter — exiles it
10. Bag of Holding — exiles it

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

a card is drawn — 1,454 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master makes a player draw a card:

1. Aether Syphon — mills a card
2. Diviner's Wand — gets +1/+1
3. Ominous Seas — puts a foreshadow counter on itself
4. Iron Man, Armored Avenger — puts a counter on a creature
5. Psychosis Crawler — makes each opponent lose 1 life
6. Lyla, Holographic Assistant — puts a counter on a creature
7. Data, New Life — puts a +1/+1 counter on itself
8. Chasm Skulker — puts a +1/+1 counter on itself
9. Nadir Kraken — puts a +1/+1 counter on itself
10. Teferi, Temporal Pilgrim — puts a loyalty counter on itself

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

a Human enters the battlefield — 634 cards in Katara's colors can cause this (Katara is one).

1. Captain of the Mists — When Katara, Waterbending Master enters, Captain of the Mists untaps itself

a card in a graveyard — 1,684 cards in Katara's colors can cause this (Katara is one).

Katara, Waterbending Master:

1. Gale, Waterdeep Prodigy — puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
2. Transplant Theorist — puts cards into the graveyard that Transplant Theorist can bring back
3. Heart-Shaped Herb — puts cards into the graveyard that Heart-Shaped Herb can bring back
4. Mindwhisker — fills your graveyard toward the 7 or more cards Mindwhisker needs
5. Barkform Harvester — puts cards into the graveyard that Barkform Harvester can bring back
6. Cybernetic Specialist — puts cards into the graveyard that Cybernetic Specialist can bring back
7. Picklock Prankster // Free the Fae — puts cards into the graveyard that Picklock Prankster // Free the Fae can bring back
8. Reito Sentinel — puts cards into the graveyard that Reito Sentinel can bring back
9. Most Decrepit Old Bird // Speak Secrets — fills your graveyard toward the 7 or more cards Most Decrepit Old Bird // Speak Secrets needs
10. Vantress Gargoyle — fills a graveyard toward the 7 or more cards Vantress Gargoyle needs

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

anything goes to a graveyard — 1,684 cards in Katara's colors can cause this (Katara is one).

When a card hits the graveyard thanks to Katara, Waterbending Master:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Energy Field — sacrifices itself

a creature attacks — 3,238 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master 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. Inquisitorial Rosette — makes a token
7. Andúril, Flame of the West — makes 2 tokens
8. Saw — sacrifices a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Throwing Knife — sacrifices itself

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

anything attacks — 3,238 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master attacks:

1. ED-E, Lonesome Eyebot — puts a quest counter on itself
2. Madame Web, Clairvoyant — mills a card
3. Dawnsire, Sunstar Dreadnought — deals 100 damage
4. Gossip's Talent — triggers
5. Alora, Merry Thief — triggers
6. Twins of Discord — triggers
7. Great Gilded Boat — draws and discards
8. Cosmic Cube — triggers
9. Doom's Time Platform — exiles a card from your graveyard

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

a creature blocks — 3,238 cards in Katara's colors can cause this (Katara is one).

When Katara, Waterbending Master blocks:

1. Barrow-Blade — strips abilities
2. Dead-Iron Sledge — kills a creature
3. Dwindle — kills a creature

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

a creature enters the battlefield — 3,581 cards in Katara's colors can cause this (Katara is one).

1. Ray Fillet, Wave Warrior — When Katara, Waterbending Master enters, Ray Fillet, Wave Warrior puts a counter on itself

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