Distinctive Arts are when a Record of Agarest War and/or Zero character's Extra Skills are combined in an existing combo of them.
There are Currently 3 in Zero
They deal massive damage
Also its for a trophy/achiement
[Soul Slave]-Helectic Nova - Mimel EX3 Catastrophe - Dyshana EX3
(Angelic Corona) Alice-Ex 3- Eternal Cross Ellis-Ex 3-C. Rejuvination
[S.O.B.]-
Eternal Cross - Alice EX3
Helectic Nova - Mimel EX3
C. Rejuvination - Ellis EX3
Catastrophe - Dyshana EX3
Rising Blaze - Seighart EX3
S, Strike - Leonis EX