Drop (not confirmed)

item	chance	amount
Superior Giant's Codex	88.5%	1–2
Scroll: Enchant R-grade Armor	78.1%	2–3
Scroll: Enchant R-grade Weapon	19.6%	1–2
Superior Giant's Codex - Chapter 1	10.0%	1
Superior Giant's Codex - Mastery Chapter 1	2.5%	1
Superior Giant's Codex - Mastery	2.5%	1
Rune Stone	2.5%	1
Mystic Armor Piece	0.8%	1