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"? 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
Related: Does the spell Erupting Earth disrupt the surface it’s cast on?