Dragon Vengeance Bookmarks by BamingoDesign 

Fierce dragons over cliffs and bones. No AMS/MMU required, only two color changes.

Print Settings:
Layer height: 0.08 mm with a base layer of 0.16 mm
Infill: 100%

Color Changes:
Start with Black (Esun PLA Black)
At layer 8 (0.72 mm), swap to Silver (Esun PLA Silver)
At layer 12 (1.04 mm), swap to White (Esun PLA Matte Milky White)

Notes: A 3MF print profile is included for AMS. Manual printing requires converting color changes to pauses or using the STL. Do not simplify the model (ignore floating regions warning). Scale only in X and Y. Split objects manually by right-click menu. Use a lighter or a heat gun to remove stringing.