Your search for "Experimental Synthesizer 138" revealed the following:
Experimental Synthesizer (NEO) from Kamigawa: Neon Dynasty, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Yeong-Hao Han Card Text:When Experimental Synthesizer enters or leaves the battlefield, exile the top card of your library. Until end of turn, you...
Experimental Synthesizer (Foil) (NEO) from Kamigawa: Neon Dynasty, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Yeong-Hao Han Card Text:When Experimental Synthesizer enters or leaves the battlefield, exile the top card of your library. Until end of turn,...
Experimental Synthesizer - NEO Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Yeong-Hao Han Card Text:When Experimental Synthesizer enters or leaves the battlefield, exile the top card of your library. Until end of...