[RPG] Does a Globe of Invulnerability protect against the Magic Weapon spell


Consider a scenario where a party of adventurers encounter a lich. The party is armed with mundane weapons which can't hurt the lich so the spellcasters begin casting magic weapon. The lich casts globe of invulnerability in response to this and stays inside of it. So what happens when the party starts attacking the lich? According to the globe of invulnerability spell description:

Any spell of 5th level or lower cast from outside the barrier can't affect creatures or objects within it, even if the spell is cast using a higher level spell slot. Such a spell can target creatures and objects within the barrier, but the spell has no effect on them. Similarly, the area within the barrier is excluded from the areas affected by such spells.

Is magic weapon excluded from working inside the globe because of the last sentence?

Best Answer

Magic weapon will work against the lich

Regarding the last sentence specifically, magic weapon does not affect an area, it only affects a target (an object). Thus, this sentence has no relevance to this spell. The only purpose of this sentence is to exclude the globe from area of effect spells like fireball and the like.

Magic weapon affects one target: a nonmagical weapon that you touch. That weapon then becomes a +1 magic weapon for the duration. When you then try to use the weapon against the lich you are not affecting the lich with the spell, you are affecting them with the newly enhanced weapon. Thus, nothing about doing this would be blocked by globe of invulnerability. The same is true if you cast enlarge or invisibility or polymorph on yourself and moved into the globe to attack.

If globe of invulnerability did work against magic weapon it would lead to ridiculously powerful results such as creatures under the invisibility suddenly become visible since the spell "affects" the lich by way of making the PC impossible for them to see. Or that mirror image stops working because it "affects" the lich by making it hard for them to hit the PC. In essence it would make this spell on par with antimagic field, an 8th level spell.