Many abilities, notably the Healing Domain 6th level feature, allow you to alter "your spells" with metamagic-like effects.
At 6th level, all of your cure spells are treated as if they were empowered, increasing the amount of damage healed by half (+50%). This does not apply to damage dealt to undead with a cure spell. This does not stack with the Empower Spell metamagic feat.
Does this feature (and/or others like it) apply when casting a spell through a scroll, wand, or staff?
Shamelessly stolen from Hey I Can Chan's Comment.
There exists this FAQ, which states:
Items as Spells: Does using a potion, scroll, staff, or wand count as "casting a spell" for purposes of feats and special abilities like Augment Summoning, Spell Focus, an evoker's ability to do extra damage with evocation spells, bloodline abilities, and so on?
No. Unless they specifically state otherwise, feats and abilities that modify spells you cast only affect actual spellcasting, not using magic items that emulate spellcasting or work like spellcasting.
Therefore, abilities or feats of a character never affect a spell cast by a magic item (unless they specify otherwise).
all of your cure spells
When you activate a spell-completion or spell-trigger item (e.g. a scroll or a wand), you are casting a spell—but I think it’s quite a stretch to say it is your spell. This is backed up by my general experience where item-derived spells did not benefit from this kind of thing; it seems at least to me that a general consensus exists on this.
Paizo does have an FAQ entry blocking class features on item-granted spells, confirming that. Note that this is inconsistent with how class features behave—see this FAQ entry on those working for all classes’ spells—but it matches my general experience of how most people play. In any event, these are only really relevant for things that are similar to the healing domain, but don’t include that crucial “your” in the description. For the healing domain, the “your” means that there really is no way to argue that item-granted spells should benefit.
Finally, let me just say that, the healing domain is pretty awful. Markedly improved over the 3.5e version, no doubt, but still quite poor. All of the spells are already cleric spells, so you don’t get one of the best potential benefits of a cleric domain, and healing in general is pretty underpowered so focusing on it like this is a bad idea. I wouldn’t want to say domains apply to item-derived spells in general, since I suspect there are domains where I’d end up regretting that, but for the healing domain specifically, allowing it to apply to items would suddenly make it worth possibly considering. That’s a lot better than considering the domain to basically be a pure trap option, which is about how I’d judge it as is.
