Corrupted modifiers overriding/reducing required level is inconsistent.

For jewellery and quivers, replacing the default implicit of the base type will override its drop level requirement if the corrupted implicit has a lower requirement.

This is inconsistent with implicits on armours and weapons, which cannot go lower than their baseline required level.

This inconsistency is confusing, and the required level should be hard-coded into the base type instead of only relying on the default implicit for jewellery/quivers.

Especially with the Rigwald's Crest change in 3.21.0, but most unique quivers still have the above behaviour.