Interesting Dispel Magic Questions

[RSP]

Tentatively, I'd say that Shadow Blade would be both an object and a magical effect (it's taking concentration to maintain after all). DM does require that the caster target something, so the caster could either target the blade itself in which case it would be uncontroversially dispelled, or they could target the caster of the shadow blade, in which case it would also end since it's an ongoing magical effect (along with any other effects they are enjoying). I think?

This is right from my perspective.

But to add to it, remember Shadow Blade has the additional text about being able to reform the blade after it disappears if thrown. So there is clearly an ongoing magical effect on the caster as well.

Just to clarify, whether or not SB is also an on-going magical effect doesn’t change that it’s different than a targeted creature. DM says you choose a) a creature, b) an object or c) an ongoing effect.

Whether SB is an object and/or an ongoing magical effect, it’s still different than targeting the creature holding that object/interacting with that ongoing magical effect.