diff --git a/forge-gui/res/editions/Secret Lair Drop Series.txt b/forge-gui/res/editions/Secret Lair Drop Series.txt
index 179ff7abecf..7a77d90f8f4 100644
--- a/forge-gui/res/editions/Secret Lair Drop Series.txt	
+++ b/forge-gui/res/editions/Secret Lair Drop Series.txt	
@@ -585,6 +585,7 @@ ScryfallCode=SLD
 609 R Hawkins National Laboratory @Ravenna Tran
 617 R Ward Sliver @Pete Venters
 618 R Diffusion Sliver @Trevor Claxton
+620 R Mesmeric Sliver @Michael Bruinsma
 626 R Synapse Sliver @Thomas M. Baxa
 628 R Winged Sliver @Anthony S. Waters
 634 R Syphon Sliver @Tyler Jacobson