Surprise Spell and spells like Spiritual weapon or Wall of Fire?

[Leonardo Trancoso]

How Surprise Spell works on spells like Spiritual weapon or Wall of Fire?

[LazarX]

Leonardo Trancoso wrote:

How Surprise Spell works on spells like Spiritual weapon or Wall of Fire?

You get your one time sneak attack bonus, assuming you cast your spell on the opponents while flat-footed. That's it. You're not going to get sneak attack damage on opponents who deliberately cross your Wall of Fire, nor are you going to get it with every swing of Spiritual Weapon.