The Haligtree Crest Greatshield is a drop from a singular Haligtree Knight located in Elphael, Brace of the Haligtree. He has a small chance of dropping his shield upon dying. It's the only knight ...
You can get the Dragoncrest Shield Talisman at the Bestial Sanctum. You can get here by travelling through Caelid or by using a teleport in the small lake north of the Third Church of Marika ...