This is a follow-up to this question: Does using a magic item that produces a spell effect on a plane with the impeded magic trait require a Spellcraft check?
Particular spells and spell-like abilities are more difficult to cast on planes with this trait, often because the nature of the plane interferes with the spell.
To cast an impeded spell, the caster must make a Spellcraft check (DC 20 + the level of the spell). If the check fails, the spell does not function but is still lost as a prepared spell or spell slot. If the check succeeds, the spell functions normally.
Can an impeded spell or spell-like ability can be cast/produced on a plane which impedes that type of magic if the character doesn't possess any ranks in Spellcraft? (Spellcraft is a trained-only skill.) If so, how?