I read a manga about half a year ago, but i forgot which one, after my pc died i lost track of it.
Trying to figure out, and its bugging me about 3 days.

A twin pair (boy and girl) chased because they can use a specific dark power. The girl is a magician who can summon the power of a dragon and the boy protects her. Their dead masters also was their grandfathers soul protects them. They encounter a fortuneteller girl who sticks with them on a journey.
Eventually they gona be captured then tortured, mindewashed, forced into incest like their parents. The boy lost one of his eyes too. Their magician friends come to the rescue, but the boy can't be saved from the dark power and has to be sealed away until they find some cure. The End.

The name of the manga really bugging me so i hope someone knows it. Thx.

Phantom Wizard ?

Yes that1s it. Thx RIP131