Phantom's List of Stolen Skills

One of the Phantom's most unique capabilities is to copy the skills of the Explorer classes; it's what makes him a master Thief. Your Impeccable Memory skill can copy the skills from 1st to 4th job, attack skill from buff, making Phantom truly versatile. However, not all skills will apply.

The Rules of Stolen Skills

Only skills of the 5 Explorer classes can be stolen. Cygnus Knights, Heroes, Resistance and Special Explorers, such as Dual Bladers, Cannoneers and Jett, are exempt from Impeccable Memory.
The level of the stolen skill depends on the level of the original skill and the level of Impeccable Memory itself. For example, If you have stolen level 20 Rage with a level 10 Impeccable Memory II, the stolen Rage will be lowered to level 10. Another example is that if you steal a level 3 Haste with level 20 Impeccable Memory I, the stolen skill will always remain at level 3.
Passive Effects of some skills cannot be stolen.
Skills that involve summons cannot be stolen. Shadow Partner, Silver Hawk and Frostprey are a few examples of summons.
Mobility skills cannot be stolen.
Maple Warrior and Hero's Will cannot be stolen.