Fire Shield
Wispy flames wreathe your body for the duration, shedding Bright Light in a 10-foot radius and Dim Light for an additional 10 feet. The flames provide you with a warm shield or a chill shield, as you choose. The warm shield grants you Resistance to Cold damage, and the chill shield grants you Resistance to Fire damage.
In addition, whenever a creature within 5 feet of you hits you with a melee attack roll, the shield erupts with flame. The attacker takes 2d8 Fire damage from a warm shield or 2d8 Cold damage from a chill shield.
Fire Shield 5e 2024 vs. 2014 edition differences
The 2024 version adds Druids and Sorcerers as classes, clarifies "Bright" and "Dim" light, and states "roll" for melee attack hits. The damage types are swapped: warm shield grants resistance to Cold, chill shield grants resistance to Fire, reversing the 2014 damage resistances.