Ongoing spells and target size changes

[Tugdual]

Sightly unrelated, since it's about non-living materials:

Growth and Shrinking

Continuing the discussion from Call for ArM5 Errata: Yes. There is definitely at least one error here. It may actually be that both are in error. I say that because the only core example we have (MuCo) suggests shrinking is notably easier than growing. If that's the general case, then the HP one doesn't need so many magnitudes and the MoH surely still needs more, so both should be corrected. Splitting out for discussion. This does need to be clarified. Looking at the general size rules, we…