- Ability Training
- Power Learning/Training
User can copy other powers simply by learning how to use them. By observing the desired ability and focusing upon it, the user will be able to copy it.
- May take a very long time.
- May require actually studying the ability first.
- May require the user to see the ability being used first.
- Copying too many abilities may cause user to lose control over them.
- Overuse of learned abilities may strain user's body and/or mind.
- Can not learn Quintessence Force.
- May not work for certain types of powers (in Naruto, Sharingan users can't copy other Kekkei Genkai).
- Body may have to be capable of adapting to the stress of the learned technique.