There are few wording things, that looks not very clear in card's descriptions, but I'm not sure how to make them better. Or may be I'm wrong and no changes required.
1. Guardian Seraph - not very clear that it loose health, but not takes damage.
Any damage that would be done to an adjacent friendly Creature is instead lost by Guardian Seraph.

2. Null Stone and Revenant Bishop: Bishop can target enchantment in Null Stone radius, since it is neither spell/enchantment nor activated ability. Since it very hard to fix that I think it is reasonable to change Null Stone's description and add ticket to fix this later someday. The problem is that it is too complicated to explain that in Null Stone's description.

3. "location" and "space" words are used in various cards, but the meaning is almost same (at least I think so). I'm not sure, but may be better to change it to space or at least change some cards, since "location" and "space" used in cards with similar logic (f.e. Mis-Scribed Circle and Ice Sheet).