Scotland wing Duhan van der Merwe returns from injury for Edinburgh's URC trip to Dragons on Saturday as both Pierre Schoeman and Magnus Bradbury prepare for their 150th appearance for the club. Van der Merwe is one of four changes from the win over Sharks last time out, as Harry Paterson also returns from injury at full-back, Ross Thompson replaces Cammy Scott at fly-half and Callum Hunter-Hill starts in the second row.