For those spells/blessings that are not opposed, say Magic Dart for example, is the check only modified by the difficulty modifier on the card and conditions with no basic difficulty? The Action Card definitions make clear the upper left indicator is not the challenge level of the action but a modifier.
So, for example, if you're not engaged, there's no way with Magic Dart you can generate the 2 bane outcome (this applies to some other spells too). Unless there are circumstance misfortune dice at work.
I thought unless checks specifically said they were special only count number of successes they were always against either a fixed or opposed challenge level but I can't find anything about this for spells. If you treated them like Ranged Attacks it would be starting Easy, 1d?
Rob