Ways to obtain Materials from NPCs are entirely through GameMoney, but how do you get GameMoney?

There are three ways:

1st Killing Monsters

Just by killing monsters, you will see that the GameMoney in your inventory will increase automatically.

2nd Battle Coin Sale

Battle Coin is a coin that turns green when it falls to the ground, which you can sell to NPCs to obtain 5,000,000kk.

3rd Bead Sale

When going to Lairs, you will earn Pendants and Beads. Pendants can be exchanged at NPCs in the City of each Race.

Beads can be sold to NPCs to obtain 10,000,000kk.