after maxing out a diamond relic you can pay amber to transcend a relic, which allows you to upgrade it ten levels, you can then do so again for every other rescource like amber added. they get a new name each time transcended and can gain effects

example

pumpseeds staff
drains 180 points of stamina from damaged enemies (1 use)

after being damaged, drains 300 stamina from attacker (2 uses)

ondanas staff
drains 200 points of stamina from damaged enemies(1 use)

after being damaged, drains 330 stamina from attacker(2 uses)

at start of turn increases stamina by % when under % stamina (scales higher both ways) (3 uses)
slugazoids staff
drains 240 points of stamina from damaged enemies (2 uses)

after being damaged, drains 360 stamina from attacker(2 uses)

at start of turn increases stamina by % when under % stamina (scales higher both ways) (3 uses)

this would be a great way to allow rescources to still have use after the era is over.