
One of the best cards around, here's why:
1: The ultimate horror soak! So long as you can keep him alive, It's a saved horror every turn. Because he can "fit" two at once, and horror effects typically hit in small bursts (often 2 or 3), you can "fill" up on some horror when it hits and slowly heal it in the aftermath. He completely takes the bite out of the worst horror treacheries in the game, the only real danger then to your sanity is a nasty enemy breathing down your neck with opportunity hits, or self inflicted pain (incidentally, one of the best solutions to the backlash of Shrivelling is having Pete around.
2: STATS! A +1 on two different stats is excellent for a single asset, and benefits multiple playstyles, whether you're harnessing to make evades and shoot an Ornate Bow or Enchanted Bow, or the to land spell charges like Shrivelling and Rite of Seeking, the other stats are still there and give you new options, help you pass localized tests like parlays and treachery tests, when your spells are empty you can evade.
Do keep in mind that both of his stats are "defensive stats", the vast majority of Treacheries that inflict skill tests target , and is up there as much less common, but still second place. Even if only defensively this guy is good, if you start looking down the barrel of late-campaign scenarios with some trauma in your bag, give him a look.