19 cards where the illustration contains “self-reference”

Cardpecker (Unhinged #4)
Cardpecker (Unhinged #4★)
Copy (Double Masters Tokens #31)
Exponential Growth (Strixhaven: School of Mages #130)
Infinite Obliteration (Magic Origins #103)
Infinity Elemental (Unstable #88)
Johnny, Combo Player (Unsanctioned #23)
Johnny, Combo Player (Unhinged #35)
Metagamer (Mystery Booster Playtest Cards 2019 #8)
Mirror Gallery (Betrayers of Kamigawa #154)
Peer into the Abyss (Core Set 2021 #117)
Quandrix Pledgemage (Strixhaven: School of Mages #219)
Reality Strobe (Future Sight #43)
Scour All Possibilities (Modern Horizons #67)
Scour All Possibilities // Scour All Possibilities (Modern Horizons Art Series #3)
Scour All Possibilities // Scour All Possibilities (Modern Horizons Art Series #3)
Square Up (Strixhaven: School of Mages #238)
Super Secret Tech (Unhinged #141)
Time Spiral (Magic Online Promos #62221)
Yawgmoth's Testament (Mystery Booster Playtest Cards 2019 #52)

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