Echo Backstab

You point to a target that you can see within range, and call an echo of that from another dimension, this echo is a magical, translucent, gray image of the target that will vanish after make one attack.

The target must suceed on a Inteligence Saving Throw, on a failed , recive 3d6 of force damage and the Echo vanishes.

At high levels : when you cast this spell using a spell slot of 2nd level or higher, affected another target within range for each slot level above 1st.