\subsection{Earthquake}\label{earthquake}

\emph{8th-level evocation}

\begin{itemize}
\tightlist
\item
  \textbf{Casting Time:} 1 action
\item
  \textbf{Range:} 500 feet
\item
  \textbf{Components:} V, S, M (a pinch of dirt, a piece of rock, and a
  lump of clay)
\item
  \textbf{Duration:} Concentration, up to 1 minute
\end{itemize}

You create a seismic disturbance at a point on the ground that you can
see within range. For the duration, an intense tremor rips through the
ground in a lOO-foot---radius circle centered on that point and shakes
creatures and structures in contact with the ground in that area.

The ground in the area becomes difficult terrain.

Each creature on the ground that is concentrating must make a
Constitution saving throw. On a failed save, the creature's
concentration is broken.

When you cast this spell and at the end of each turn you spend
concentrating on it, each creature on the ground in the area must make a
Dexterity saving throw. On a failed save, the creature is knocked prone.

This spell can have additional effects depending on the terrain in the
area, as determined by the DM.

\textbf{Fissures.} Fissures open throughout the spell's area at the
start of your next turn after you cast the spell. A total of 1d6 such
fissures open in locations chosen by the DM. Each is lle X 10 feet deep,
10 feet wide, and extends from one edge of the spell's area to the
opposite side.

A creature standing on a spot where a fissure opens must succeed on a
Dexterity saving throw or fall in. A creature that successfully saves
moves with the fissure's edge as it opens.

A fissure that opens beneath a structure causes it to automatically
collapse (see below).

\textbf{Structures.} The tremor deals 50 bludgeoning damage to any
structure in contact with the ground in the area when you cast the spell
and at the start of each of your turns until the spell ends. If a
structure drops to 0 hit points, it collapses and potentially damages
nearby creatures. A creature within half the distance of a structure's
height must make a Dexterity saving throw. On a failed save, the
creature takes 5d6 bludgeoning damage, is knocked prone, and is buried
in the rubble, requiring a DC 20 Strength (Athletics) check as an action
to escape. The DM can adjust the DC higher or lower, depending on the
nature of the rubble. On a successful save, the creature takes half as
much damage and doesn't fall prone or become buried.
