Here we expand upon the use of Hack100’s “Powers” (i.e. Specialities that are extraordinary or supernatural in some way) by looking at a particular set of examples: spell casting.
Firstly, with regards to the specific wording of a spell caster’s Power, it is recommended that very broad definitions (e.g. “Magic”) are avoided in favour of narrower areas of focus (e.g. “Fire Magic”, “Illusionism”, “Necromancy”, etc.). This will help to keep the range of a given spell caster’s ability within well-defined boundaries, and also ensure that their magic use has a distinctive flavour.