Nova

lvl 1 Warlock (The Star)

You can use your bonus action to create a Nova.   When you enter a Nova, and each subsequent turn you begin while your Nova is active, you take special radiant damage called Nova damage. This damage begins at 1d6 when you enter your Nova, and increases to 2d6 the following turn, 3d6 the turn after, and so on. This damage can’t be reduced or avoided. You don't make Constitution saving throws to maintain your concentration as a result of taking this damage. Your Nova ends if you drop to 0 hit points or if you use your bonus action to end it.   While your Nova is active, you can add additional d6s of damage, up to a maximum of twice the Nova damage you have taken on your turn, when you damage a creature with an attack on your turn. You can choose to add all the damage dice to the roll of a single attack, or divide up the damage among multiple attacks.