You Clasp your hands in Prayer and call for the help of Corellon and his Seers, however you did not specify which. Upon landing a hit roll any die, Even numbers will call upon Mystra the goddess of Blessing, odds will call upon Cyric the God of curses, Landing an Attack Crit allows you to choose which seer to call upon. Roll 2d6 for Radiant damage or Necrotic damage done, rolling Mystra gives you Radiant Damage rolling Cyric gives you Necrotic Damage.
If damage hits a target weak to the damage dealt, the next attack against them before the end of its next turn is made with advantage.
The number of Die increases by 1 when you reach 3rd level (3 Die), 6th level (4 Die), 9th level (5 Die), 11th level (6 Die), 14th level (7 Die), and 17th level (8 Die).