Ursine Monstrosity

a Bear enters the battlefield — 128 cards in the game can cause this (Ursine Monstrosity is one).

1. Ayula, Queen Among Bears — When Ursine Monstrosity enters, Ayula, Queen Among Bears triggers

a Mutant attacks — 280 cards in the game can cause this (Ursine Monstrosity is one).

1. Wolverine, Claws Out — When Ursine Monstrosity attacks, Wolverine, Claws Out makes your creatures bigger

a Mutant deals combat damage — 280 cards in the game can cause this (Ursine Monstrosity is one).

1. Heroes in a Half Shell — When Ursine Monstrosity deals combat damage, Heroes in a Half Shell puts a counter on a permanent

a Mutant enters the battlefield — 286 cards in the game can cause this (Ursine Monstrosity is one).

When Ursine Monstrosity enters:

1. Genghis Frog — makes a token
2. X-23, Deadly Weapon — puts a counter on a permanent
3. April O'Neil, Live on the Scene — triggers

a card in a graveyard — 7,589 cards in the game can cause this (Ursine Monstrosity is one).

1. Samwise Gamgee — Ursine Monstrosity puts cards into the graveyard that Samwise Gamgee can bring back
2. Bloodbond March — Ursine Monstrosity puts cards into the graveyard that Bloodbond March can bring back
3. Thor, God of Thunder — Ursine Monstrosity puts cards into the graveyard that Thor, God of Thunder can bring back
4. Gale, Waterdeep Prodigy — Ursine Monstrosity puts cards into the graveyard that Gale, Waterdeep Prodigy can bring back
5. Harness the Storm — Ursine Monstrosity puts cards into the graveyard that Harness the Storm can bring back
6. Transplant Theorist — Ursine Monstrosity puts cards into the graveyard that Transplant Theorist can bring back
7. Heart-Shaped Herb — Ursine Monstrosity puts cards into the graveyard that Heart-Shaped Herb can bring back
8. Wayward Angel — Ursine Monstrosity fills your graveyard toward the 7 or more cards Wayward Angel needs
9. Rescue from the Underworld — Ursine Monstrosity puts cards into the graveyard that Rescue from the Underworld can bring back
10. Victimize — Ursine Monstrosity puts cards into the graveyard that Victimize can bring back

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

anything goes to a graveyard — 7,589 cards in the game can cause this (Ursine Monstrosity is one).

When a card hits the graveyard thanks to Ursine Monstrosity:

1. Quest for Ancient Secrets — puts a quest counter on itself
2. Planar Void — hits a graveyard
3. Measure of Wickedness — gives an opponent control of itself
4. Energy Field — sacrifices itself

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

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

When Ursine Monstrosity 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

116 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 (Ursine Monstrosity is one).

When Ursine Monstrosity 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. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
7. Saw — sacrifices a creature
8. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
9. Ultima Weapon — kills a creature an opponent controls
10. Total War — kills a creature

188 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 (Ursine Monstrosity is one).

When Ursine Monstrosity blocks:

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

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Ursine Monstrosity is one).

1. Mardu Ascendancy — When Ursine Monstrosity attacks, Mardu Ascendancy makes a token

2 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 (Ursine Monstrosity is one).

When Ursine Monstrosity 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

341 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 (Ursine Monstrosity is one).

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

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