Divine Strike

It was during the first great war against the age of gold when queen Eris the Celestial poured golden light down upon the battlefield, imbuing her soldiers' blades and weapons in healing light. so it was that the first war was won with minimal casualties, and many praising the blasphemous tyrant who smothered life itself with a facade of golden light and a crooked smile.

use a bonus action and a 1st level spell slot to imbue your weapon with divine magic. the next attack you do will deal an additional 1d8 radiant damage and heal you for all damage dealt to the enemy with this SINGLE attack, this accounts for all damage done during the attack and scales with abilities like divine smite. if you heal more than your max health you can spread healing to any ally you choose within 30 feet of you.

at higher levels:

every level this is upcast deals an additional 1d8 damage.