16 cards where the illustration contains “thread”

Boneknitter (Onslaught #128)
Calix, Destiny's Hand (Theros Beyond Death #211)
Calix, Destiny's Hand (Theros Beyond Death #257)
Calix, Guided by Fate (March of the Machine: The Aftermath #26)
Calix, Guided by Fate (March of the Machine: The Aftermath #76)
Fate Unraveler (Born of the Gods #68)
Goblin Chirurgeon (Fallen Empires #54a)
Legions of Lim-Dûl (Ice Age #142)
Mouse (Throne of Eldraine Tokens #4)
Relentless Pursuit (Theros Beyond Death #195)
Sleeper's Guile (Urza's Legacy #67)
Smothering Tithe (Wilds of Eldraine: Enchanting Tales #13)
Suture Spirit (Eventide #16)
The Akroan War (Theros Beyond Death #124)
Tymna the Weaver (Commander 2016 #48)
Unmask (Mercadian Masques #168)

This search is finished. Now the real work can begin.