26 cards where the name includes “sol ring” and the card is available on Paper

Sol Ring (Outlaws of Thunder Junction Commander #267)
Sol Ring (Commander Collection: Black #7)
Sol Ring (Commander Collection: Green #7)
Sol Ring (Limited Edition Alpha #269)
Sol Ring (Fallout #359)
Sol Ring (Fallout #767)
Sol Ring (Secret Lair Drop #1696)
Sol Ring (Secret Lair Drop #1494)
Sol Ring (Secret Lair Drop #1074)
Sol Ring (Doctor Who #245)
Sol Ring (Commander Masters #703)
Sol Ring (Tales of Middle-earth Commander #284)
Sol Ring (Tales of Middle-earth Commander #408)
Sol Ring (Tales of Middle-earth Commander #409)
Sol Ring (Tales of Middle-earth Commander #410)
Sol Ring (Warhammer 40,000 Commander #249)
Sol Ring (Warhammer 40,000 Commander #250)
Sol Ring (Warhammer 40,000 Commander #251)
Sol Ring (Warhammer 40,000 Commander #252)
Sol Ring (Secret Lair Drop #1011)
Sol Ring (Secret Lair Drop #249)
Sol Ring (MagicFest 2019 #7)
Sol Ring (Kaladesh Inventions #24)
Sol Ring (From the Vault: Relics #12)
Sol Ring // Sol Ring (Secret Lair Drop #1512)
Sol Ring // Sol Ring (Secret Lair Drop #1512)
Sol Ring // Sol Ring (Commander Masters Art Series #70)
Sol Ring // Sol Ring (Commander Masters Art Series #70)

The message was clear to Sorin—time to search for something else.