Board Thread:Questions and Answers/@comment-7467815-20130506124256/@comment-7039146-20130509031409

You can max the skill level up to lvl.20 if you have enough same skill maga..

Example;

4*Kashinkoji max skill lvl.13, so you need 7 Kashinkoji's magatama more

5*Shotaro Fuma max skill lvl.15, so you need 5 Shotaro Fuma's magatama more