When you discard a Detention to use a Memory Charm and it stuns you, is the Charm's health tier fixed at the level you had when you declared it?

Question

Accepted Answer

Yes. Your health tier is fixed when you declare the Charm. Resolve the discard first, including a Detention's 2-health loss, then the stun, then the rest of the Charm at the declared tier.

Harry Potter: Hogwarts Battle

When you discard a Detention to use a Memory Charm and it stuns you, is the Charm's health tier fixed at the level you had when you declared it?