Divine Smite

Source: D&D 5.2 SRD Spells

Level 1 Evocation (Paladin)

• Casting Time: Bonus Action, which you take immediately after hitting a target with a Melee weapon or an Unarmed Strike
• Range: Self
• Components: V
• Duration: Instantaneous

The target takes an extra 2d8 Radiant damage from the attack. The damage increases by 1d8 if the target is a Fiend or an Undead.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 1.