Petra Sphinx

a Sphinx attacks — 144 cards in the game can cause this (Petra Sphinx is one).

1. The Ur-Sphinx — When Petra Sphinx attacks, The Ur-Sphinx mills a card

a Sphinx enters the battlefield — 149 cards in the game can cause this (Petra Sphinx is one).

1. Unesh, Criosphinx Sovereign — When Petra Sphinx enters, Unesh, Criosphinx Sovereign triggers

a card is milled — 772 cards in the game can cause this (Petra Sphinx is one).

1. Lo and Li, Royal Advisors — When a permanent makes a player mill a card thanks to Petra Sphinx, Lo and Li, Royal Advisors puts a counter on an Advisor

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

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

When a card hits the graveyard thanks to Petra Sphinx:

1. The Haunt of Hightower — puts a +1/+1 counter on itself
2. Duskmantle Guildmage — makes each opponent lose 1 life
3. Vulturous Zombie — puts a +1/+1 counter on itself
4. Quest for Ancient Secrets — puts a quest counter on itself
5. Bloodchief Ascension — makes each opponent lose 2 life
6. Compost — draws you 1 card
7. Planar Void — hits a graveyard
8. Measure of Wickedness — gives an opponent control of itself
9. Energy Field — sacrifices itself

2 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 (Petra Sphinx is one).

When Petra Sphinx 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 (Petra Sphinx is one).

When Petra Sphinx 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 (Petra Sphinx is one).

When Petra Sphinx 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 (Petra Sphinx is one).

1. Mardu Ascendancy — When Petra Sphinx 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 (Petra Sphinx is one).

When Petra Sphinx 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 (Petra Sphinx is one).

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

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