Palantír of Orthanc

you scry — 420 cards in the game can cause this (Palantír of Orthanc is one).

When Palantír of Orthanc scries:

1. Prudent Fateseer // Peer Review — gives +1/+0
2. Diviner of Victory // Unwind History — gets +1/+1
3. Saheeli, Consul of Oversight — makes a token
4. Celeborn the Wise — makes your creatures bigger
5. Proft, Consulting Detective — puts a +1/+1 counter on itself
6. Matoya, Archon Elder — draws you 1 card
7. Denzilore Fatehold — puts a counter on a creature
8. Elminster — costs less
9. Elrond, Master of Healing — puts a counter on a creature
10. Galadriel of Lothlórien — puts a land onto the battlefield

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

life is lost — 3,160 cards in the game can cause this (Palantír of Orthanc is one).

When a permanent makes a player lose life thanks to Palantír of Orthanc:

1. Far Fortune, End Boss — raises your speed
2. Zahur, Glory's Past — raises your speed
3. Mendicant Core, Guidelight — raises your speed
4. Aether Syphon — raises your speed
5. Vnwxt, Verbose Host — raises your speed
6. Embalmed Ascendant — raises your speed
7. Slick Imitator — raises your speed
8. Nesting Bot — raises your speed
9. Howlsquad Heavy — raises your speed
10. Hour of Victory — raises your speed

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

an artifact is cast — 3,683 cards in the game can cause this (Palantír of Orthanc is one).

When Palantír of Orthanc is cast:

1. Sai, Master Thopterist — makes a token
2. Ravenous Robots — makes a token
3. Pinnacle Emissary — makes a token
4. Mirrodin Besieged — makes a token
5. Poetic Ingenuity — makes a token
6. Digsite Engineer — makes a token
7. Myrsmith — makes a token
8. Riddlesmith — draws you 1 card
9. Dr. Madison Li — puts a counter on a permanent you control
10. Biotransference — makes you lose life

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

a nontoken artifact enters the battlefield — 3,768 cards in the game can cause this (Palantír of Orthanc is one).

When Palantír of Orthanc enters:

1. Ultron, Artificial Malevolence — makes a token
2. The Prydwen, Steel Flagship — makes a token
3. Conquest Mission — puts a quest counter on itself
4. Surge Conductor — proliferates
5. Replication Specialist — makes a token
6. Weapons Manufacturing — makes a token
7. Mirrorworks — makes a token

a card is drawn — 3,815 cards in the game can cause this (Palantír of Orthanc is one).

When Palantír of Orthanc makes a player draw a card:

1. Temmet, Naktamun's Will — gives +1/+1
2. Niv-Mizzet, Parun — deals 1 damage
3. The Locust God — makes a token
4. Starving Revenant — makes each opponent lose 1 life
5. Diviner's Wand — gets +1/+1
6. Ominous Seas — puts a foreshadow counter on itself
7. Dream Trawler — gets +1/+0
8. Iron Man, Armored Avenger — puts a counter on a creature
9. The Astonishing Ant-Man — puts a +1/+1 counter on itself
10. Psychosis Crawler — makes each opponent lose 1 life

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

anything gets a counter — 4,415 cards in the game can cause this (Palantír of Orthanc is one).

1. All Will Be One — When Palantír of Orthanc gets a counter, All Will Be One deals that much damage

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

an artifact enters the battlefield — 4,643 cards in the game can cause this (Palantír of Orthanc is one).

When Palantír of Orthanc enters:

1. Transplant Theorist — draws you 1 card
2. Elvish Archivist — puts 2 +1/+1 counters on itself
3. Golbez, Crystal Collector — surveils
4. Sludge Strider — makes a player lose 1 life
5. Underhanded Designs — makes each opponent lose 1 life
6. Mechan Assembler — makes a token
7. Glassdust Hulk — gets +1/+1
8. Rook Turret — draws you 1 card
9. Hedron Detonator — deals 1 damage
10. Pactdoll Terror — makes each opponent lose 1 life

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

a card in a graveyard — 7,589 cards in the game can cause this (Palantír of Orthanc is one).

Palantír of Orthanc puts cards into the graveyard that:

1. Vessel of Endless Rest — can bring back
2. Samwise Gamgee — can bring back

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