Thoughts:
- Purge aberration is just the aberration version of the ability that WotC has been giving to clerics recently: 1d6 damage per cleric level (see Destroy Undead, p 87 in Complete Divine). They are adding the first 5 levels required to get into the PrC, however, which is a bit odd though I see why they did it.
- Manifest Spellshapers apply to spells only (which is odd as it say is includes psions, which are psi power, though are treated as spells sometime). Infusions don't apply (so it cannot to artificers)
- Valenar Trample: You can only overrun 1 opponent per overrun, so that is 1 target. Main benefit is that both you and your horse get to attack instead of no one (w/o Trample) or your horse (w/ Trample). I'd also say the Improved Overrun does not apply (the *horse* is overrunning/trampling, not you). Its not a problem.
- Zaelshin Tu: Three +2 bonuses are at least 900gp (using multiple similar ability rule of item creation); the feat bonus is class restricted, so its 30% off whatever a feat would cost (about 10,000gp looking at feat granting items), so 7000gp for that. Adding 1.5 the lower ability since we have two different features gives us a rough process of 8350gp. Its only usuable by Valenar elves, so depending on how generous you want to be, the price would be in the 4175-6262gp range, meaning its woefully underpriced.
- Revenant Blade: If folks don't like it, thats fine by me. I'm not attached, and probably misjudged it.
- Mastery of the Mists: You do have to be 9th level for this to work, which by then a Dreamsight Elite shifter is going to be able to shift and see invisible whenever he/she really needs it (the shifter in my RL campaign can do it at least 7 times per day and have it last longer than a minute each time); so I don't think that part is an huge issue. And targetting one creating/object on the Ethereal sometimes (you'll be able to do 4th level spells 50% of the time when you first take the feat) is worse than Transdimensional spell which gets everybody there, guaranteed.
- Mastery of the Twisted Shadows: Auto-blur whenever you cast an illusion spell. Duration is a bit much, especially as you can take this 1st level. 1 round, maybe.
PS Anyone have a problem w/ the warforged ones?