Is the last boss of The Lost City of Amdapor (Hard) a Sin Eater?

[Cleretic]

The Sin Eater-like enemies in Amdapor are animated statues created by White Mages, not actual Sin Eaters. The official explanation (I believe from the 2nd lore book) is that the Amdapori saw visions of Sin Eaters and designed their statues after them.

Yeah, it's exactly this. Although it should be underlined that since the First's Sin Eaters didn't exist, it's up in the air where exactly they found some... and very possible they made the originals themselves.