Steel Wind Strike and bonuses to hit or damage

[KorvinStarmast]

Steel Wind Strike | 5th-level conjuration
Casting Time: 1 action | Range: 30 feet
Components: S, M (a melee weapon worth at least 1 sp)
Duration: Instantaneous

You flourish the weapon used in the casting and then vanish to strike like the wind.
Choose up to five creatures you can see within range.
Make a melee spell attack against each target.
On a hit, a target takes 6d10 force damage.

You can then teleport to an unoccupied space you can see within 5 feet of one of the targets you hit or missed.

The text of the spell under discussion.

For Amnestic: neat idea, as regards spirit shroud. Will discuss with our DM.

I'd let Spirit Shroud apply to all the SWS attacks, rather than just the ones who were within 10ft of you when you cast it.