Instead of giving the realm with relics a bonus to dmg output how about changing the bonus completely. I think someone mentioned it in a previous post, but they could introduce and relic dungeon. So when you posses a relic it will open a certain level of the dungeon. The more relics you have to deeper the dungeon you can venture.
To make this attractive it would need special item drops, epic mobs, and maybe unique items only available in this dungeon. For example - An item can have some special stat that only becomes active when you have the required amount of relics.
Owning 1 relic = lvl 1 of the Dungeon
Owning 2 relics = lvl 2 of the Dungeon
Owning 3 relics = lvl 3 of the Dungeon
Owning 4 relics = lvl 4 of the Dungeon
Owning 5 relics = lvl 5 of the Dungeon
Owning 6 relics = lvl 6 of the Dungeon
Ofc lvl 6 of the Dungeon dropping the most desired items etc
The dungeon being located on Agramon Island
To make this attractive it would need special item drops, epic mobs, and maybe unique items only available in this dungeon. For example - An item can have some special stat that only becomes active when you have the required amount of relics.
Owning 1 relic = lvl 1 of the Dungeon
Owning 2 relics = lvl 2 of the Dungeon
Owning 3 relics = lvl 3 of the Dungeon
Owning 4 relics = lvl 4 of the Dungeon
Owning 5 relics = lvl 5 of the Dungeon
Owning 6 relics = lvl 6 of the Dungeon
Ofc lvl 6 of the Dungeon dropping the most desired items etc
The dungeon being located on Agramon Island