Den Protector

a creature is turned face up — 238 cards in the game can cause this.

When Den Protector is turned face:

1. Printlifter Ooze — up, Printlifter Ooze makes a token
2. Experiment Twelve — up, Experiment Twelve puts its power counters on a permanent
3. Pyrotechnic Performer — up, Pyrotechnic Performer deals its power damage
4. Pine Walker — up, Pine Walker untaps a permanent
5. Experimental Lab // Staff Room — up thanks to Experimental Lab // Staff Room, it brings a card back
6. Fatal Mutation — up, Fatal Mutation kills it

a Warrior attacks — 1,319 cards in the game can cause this (Den Protector is one).

1. Najeela, the Blade-Blossom — When Den Protector attacks, Najeela, the Blade-Blossom makes a token

a Warrior deals combat damage — 1,319 cards in the game can cause this (Den Protector is one).

1. Raiders' Spoils — When Den Protector deals combat damage, Raiders' Spoils makes you lose life

a Warrior creature enters the battlefield — 1,401 cards in the game can cause this (Den Protector is one).

1. Obsidian Battle-Axe — When Den Protector enters, Obsidian Battle-Axe triggers

a Warrior enters the battlefield — 1,403 cards in the game can cause this (Den Protector is one).

When Den Protector enters:

1. Mardu Woe-Reaper — hits a graveyard
2. Thrasher Brute — makes each opponent lose 1 life
3. Decorated Champion — puts a +1/+1 counter on itself

anything leaves a graveyard — 2,503 cards in the game can cause this (Den Protector is one).

When Den Protector leaves a graveyard:

1. Blastoneuron — makes each opponent lose 1 life
2. Defiled Crypt // Cadaver Lab — makes a token
3. Teval, the Balanced Scale — makes a token
4. Hologram Stalker — makes a token
5. Tormod, the Desecrator — makes a token
6. Quintorius, Field Historian — makes a token
7. Garrison Excavator — makes a token
8. Amzu, Swarm's Hunger — makes a token
9. Kirol, History Buff // Pack a Punch — becomes prepared
10. Teval's Judgment — triggers

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

a Human enters the battlefield — 4,639 cards in the game can cause this (Den Protector is one).

When Den Protector enters:

1. General Kudro of Drannith — hits a graveyard
2. Heronblade Elite — puts a +1/+1 counter on itself
3. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
4. Thalia's Lieutenant — puts a +1/+1 counter on itself
5. Champion of the Parish — puts a +1/+1 counter on itself
6. Captain of the Mists — untaps itself
7. Erkenbrand, Lord of Westfold — gives +1/+0
8. Beregond of the Guard — gives +1/+1
9. Théoden, King of Rohan — grants double strike
10. Lossarnach Captain — taps a creature an opponent controls

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

put a card into a graveyard — 7,589 cards in the game can cause this.

1. Sarinth Steelseeker — Sarinth Steelseeker puts cards into the graveyard that Den Protector can bring back
2. Stubborn Burrowfiend — Stubborn Burrowfiend puts cards into the graveyard that Den Protector can bring back
3. Splinterfright — Splinterfright puts cards into the graveyard that Den Protector can bring back
4. Territory Culler — Territory Culler puts cards into the graveyard that Den Protector can bring back
5. Krosan Cloudscraper — When Krosan Cloudscraper is in the graveyard, Den Protector can bring it back
6. Serpentine Basilisk — Serpentine Basilisk puts cards into the graveyard that Den Protector can bring back
7. Hermit Druid — Hermit Druid puts cards into the graveyard that Den Protector can bring back
8. Defiant Survivor — Defiant Survivor puts cards into the graveyard that Den Protector can bring back
9. Hauntwoods Shrieker — Hauntwoods Shrieker puts cards into the graveyard that Den Protector can bring back
10. Thawbringer — Thawbringer puts cards into the graveyard that Den Protector can bring back

7,579 other cards cause it too. These are the ones with the most connections.

anything attacks — 17,934 cards in the game can cause this (Den Protector is one).

When Den Protector attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

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

a creature attacks — 17,934 cards in the game can cause this (Den Protector is one).

When Den Protector attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls

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

a creature blocks — 17,934 cards in the game can cause this (Den Protector is one).

When Den Protector blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Tide of War — sacrifices a creature
3. Dead-Iron Sledge — kills a creature
4. Dwindle — kills a creature

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

a creature enters the battlefield — 19,800 cards in the game can cause this (Den Protector is one).

When Den Protector enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Ray Fillet, Wave Warrior — puts a counter on itself
3. The Neutrinos — gets +1/+0
4. Wingnut, Bat on the Belfry — grants flying, haste and menace
5. Aetherstorm Roc — puts a counter on a permanent you control
6. Raphael, Most Attitude — exiles a card from your library

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

anything enters the battlefield — 26,499 cards in the game can cause this (Den Protector is one).

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

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