True Strike (UA)

Guided by a flash of magical insight, you make one attack with the weapon used in the spell's casting. The attack uses your spellcasting ability for the attack and damage rolls instead of using Strength or Dexterity. If the attack deals damage, it can be Radiant damage or weapon's normal damage type (your choice).

Whether you choose to deal Radiant damage or weapon's normal damage type, the attack an additional Radiant damage at 5th level (1d6), 11th level (2d6) and 17th level (3d6)