All the surfaces within a square up to 25 ft. wide, and the area extending up to 5 ft. above them fill with hazardous elemental energy.
Intensify: Make the square up to 5 ft. bigger per boost from Intensify.
(If a space is occupied by multiple unsafe spaces, only the strongest will have any effect.)

When you cast this spell, you can try a DC 10 test of Spellcraft to adjust or reshape the spell’s area without making it larger.

Any creatures within your unsafe space when it is created do not take damage from it until the start of their turns.

Any creature which starts its turn in an unsafe space,
or enters or touches any unsafe space during its turn,
or ends its turn in an unsafe space
takes 1d4 elemental damage,
and does not take damage from any Making Unsafe Spaces spell again until the start of its next turn.
Intensify: +1d4 elemental damage per boost from Intensify.

As an action, you can try a DC 10 test of Spellcraft to move or adjust the area of your unsafe space. You cannot move it more than 300 ft. from you, and it must be on a surface, it cannot float in midair.

(A creature can try to jump over an unsafe space, but if it fails it will land prone in the unsafe space.)

Dissipate d4:
At the start of each of your turns, roll a d4. If you roll a 1, this spell ends.

You can end this spell as a fast action.

Suggested Backfire: The spaces heal creatures which stand on them, or the spell is cast on unintended targets.