To easily gain Entai, recruit or create five new members and add them all to your party at once. Unequip the weapons and armors they are wearing, then dismiss all five of the newly created people. Go to the shop, and sell the weapons and armor that you just unequipped. They are worth 10 Entai each, for a total of 100 Entai. Repeat as desired.
Unlock the following items by performing the corresponding tasks:
ITEM - HOW TO UNLOCK Brute Wing - Kill Chimarea while it is poisoned Cut Quill - Kill Harupia while she is poisoned Red Claws - Kill Hellion with Death status (Issen, Climax) Red Spine - Kill Colossus without bashing it (no bash element attacks) Snow Bone - Kill Scylla in five or less turns