Nomad Decoy The only thing I have to say about this creature is that without red and/or black you better get 2 more creatures and fast. This guy with the Threshold is worse than most fatties, tapping 2 creatures for mere WW. In short get rid of it fast or pick it first before it gets kidnapped.
Patrol Hound It aint no Wild Mongrel, but it has potential holding most of those pesky X/2 creatures.
Pianna, Nomad Captain - Soltari Champion without shadow and attacks as 3/3. What more could you ask for?
Pilgrim of Justice This pro-red fella holds the big Xs out and those pesky fatties as well along with reds quick Mad Dog and Minotaur Explorer, which black doesnt have to offer.
Pilgrim of Virtue The pro-black guy has very little to offer, see the pro-red dude for more details.
Ray of Distortion Disenchant for 3W!! Over costed like hell, and is there just for its Flashback (which costs 4WW). For constructed it might have some effect against pesky enchantments/artifacts like Kirtars Desire, Chamber of Manipulation, Casutic Tar, Squirrel Nest, Steamclaw, etc. And thats why it has no reason to be played out of a limited decks sideboard.
Resilient Wanderer Not bad for limited, bad for the rest, like most cards in this set.
Sacred Rites For 1W Shiled Wall gave you +0/+2. To do the same here you need to play 3 cards (Rites + discard 2). No further questions.
Second Thoughts Overcosted, but 2WW would make it problematic as a splash, in which case it serves wonderfully. Save it for the real fatties.
Shelter One of my favorite non-creature cards in the set for limited. Usually helps killing a creature and can recycle itself easily.
Soulcatcher If fliers you control die this means this one probably died first, but theres nothing wrong with turn 2 flier anyway.
Sphere of Duty, Grace, Law, Reason and Truth Except for Duty, no sphere has place in maindecks of limited decks. No sphere has place even in the sideboards of decks that arent limited, except for Law.
Spiritualize At first I thought it was Reverse Damage for a creatures damage. It doesnt prevent the damage, therefor barely useful. Nice to have it against a Rabid Elephant blocked by 4 1/1s and gain 11 life and draw a card. Not nice having it in 99% of the other cases.
Tattoo Ward Except for the fact it ruins enchantments it doesnt do anything really, except destroying other enchantments on the creature. The +1/+1 is really invalid here.
Testament of Faith For W, this Enchantment-Wall is great to have. It has two good uses, blocking and Threshold helper (pay 0).
Tireless Tribe Riddle: What can kill all X/1s and stay alive unless you need more than 2 cards (in case X>4)? Answer: This creature. Great protector against all those pesky 3/Xs and 4/Xs. Each card simply becomes Fend Off.
Try to see what happens when you make it bigger.
Wayward Angel Serra for 4WW is an overcost. Believe me itll be destroyed way before it gets Threshold. If not, Serra wouldve been better anyway.