The description of the spell Erupting Earth says:
Choose a point you can see on the ground within range.
Does the use of the word “ground” limit this spell to floors that would be considered an “exposed surface of the earth”? Or can it be cast on other kinds of surfaces?
Other possibilities include:
- An indoor room on an upper level or over a basement
- An outdoor deck or patio
- A raised platform like a stage or pulpit
- A roof
- A balcony
- The deck of a ship
Commenter Hobbamok found an excellent related question that may reduce this one to an unnecessary duplicate: What is “the ground”?