I was thinking about making a Wizard that casts glyphs of warding on his skin (which is a surface) such that any time that I take damage, the source of the damage gets hit with stored fireball spells until they die. My DM said that I could not do this, because my skin does not count as a surface. I know that my DM would be willing to let me do this if I could prove to him that this would work RAW. How do I do this?
[RPG] cast a glyph of warding on theself
dnd-5espellstraps
Best Answer
Your skin is probably not a surface. Just cast it on an object you wear or carry.
Glyph of warding gives examples of surfaces:
This seems to indicate that the intent is that a creature's skin is probably not a "surface" in the sense of the spell. There might be room for a DM to rule that you can do this on your actual skin, but there is no need - you can cast it on the surface of an object you wear or carry. Notably, the glyph can be inscribed on very small objects.
However, the real issue is...
If you move more than 10 feet, the spell ends.
Glyph of warding says:
So if you do cast it on an object you wear or carry, the spell ends if you move that object more than 10 feet.