15 cards where the card types include “goblin” and it’s legal in Commander and the text includes “sacrifice a goblin:”

Skirk Prospector (Dominaria Remastered #137)
Siege-Gang Commander (Dominaria Remastered #136)
Pashalik Mons (Dominaria Remastered #133)
Goblin Trashmaster (Core Set 2019 #144)
Goblin Chirurgeon (Masters Edition #94)
Sling-Gang Lieutenant (Modern Horizons #108)
Goblin Lookout (Legions #101)
Goblin Sledder (Duel Decks Anthology: Elves vs. Goblins #41)
Arms Dealer (Magic 2013 #120)
Mogg Raider (Tempest #191)
Goblin Soothsayer (Mirage #179)
Weirding Shaman (Morningtide #84)
Tar Pitcher (Duel Decks Anthology: Elves vs. Goblins #53)
Facevaulter (Modern Masters #85)
Goblin Turncoat (Dominaria Remastered #87)

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