>Attack power permamently increased for each evergaol prisoner defeated + starts with stonesword key
>assuming everyone in your team is running it (and they should) that's already 3 gaols without the need to go at forts or gchurches
>15% damage buff
We are talking about 20 "different" damage increase relics and at 15% (not a single fort/great church done) it beats 70% of them while being better since it applies to all damage