So I'm confused about the pilgrim. I understand he can act like a free generic seal, but I don't get the second ability. He gives monsters -1 cost? Doesn't that mean that they are cheaper to cast and consequently fill your monster attack board faster? Or how about Full moon that seems to add monster cost by 4 for each villager bit. Wouldn't that be beneficial since that makes monsters cost a ton of power in order to be cast? The wording and the symbols used in those cards is counterintuitive.
The moon icon is our symbol for monster power.
Monsters cost a certain amount of monster power, but the moon icon doesn't just mean "monster cost."
The Pilgrim gives the monsters -1 monster power.
The Full Moon can give the monsters +4 monster power.