Eredan

I really dont know how works? is it like but on your order bonus, or is it with one of your other chacaters.

if 1 of the characters in battle have his order bonus you can choose a nehantic spell from your discard

ok so I have dimizar equip this spell on turn to with empty discard, on turn 4 has her bonun and on my discard pile I have 2 Detestation of heart and I played 2 nehantic spell nothing happened

the pick a nehantic spell from the discard pile effect only happens during it's activation.

so it works like in the name of the dragon and the +1 defense is the only 2 fights....
can I pick up a AOE spell?

if the aoe spell is a corruption yes

Activation: If you or the opposing character has their order bonus, pick a corruption from your discard and play it.

Doesn't work with non corruptions ex: ,

Def+1 until the end of the second fight.

It isn't very good, and completely outclasses it.