\subsection{Fire Shield}\label{fire-shield}

\emph{4th---level evocation}

\begin{itemize}
\tightlist
\item
  \textbf{Casting Time:} 1 action
\item
  \textbf{Range:} Self
\item
  \textbf{Components:} V. S. M (a bit of phosphorus or a firefly)
\item
  \textbf{Duration:} 10 minutes
\end{itemize}

Thin and wispy flames wreathe your body for the duration, shedding
bright light in a 10-foot radius and dim light for an additional 10
feet. You can end the spell early by using an action to dismiss it.

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, the shield erupts with flame. The attacker takes 2d8 fire
damage from a warm shield, or 2d8 cold damage from a cold shield.
