How about, making a collectable number of. When you retrieve all the relics, (Since its a number of them, maybe make it so that whole towns would look for them.) And depending on what set you've gathered, you could get difdernt town bonuses,like crop growth, access to a spiecal mining map, or maybe just randomly get ores in there town. Cheap transumsions, like iron to gold, but more cost effective then aalchemist. Thing that that would be cool to have for towns.
No PvP region relics,
Free nether port relics,
Warp skill relics,
Mob egg spawning relics,
Random wood cutting relics,
Mining world, with more ores then all the other worlds,
Random animal spawning relics,
Turret relics,
Anti mob relics,
Random instant resources or gold,
It would be interesting to see how towns would work for these goals, it would make a lot more world PvP, and if a town needs only a couple more relics, they might buy then off of other players.