QUOTE(Alexander44 @ Apr 3 2021, 14:44)

Hello, as a newcomer in the hentaiverse, are these artifacts kept after the event is over? can they still be shrined after the 5th of april?
You should shrine one set (one of each of the seven vaccine vials) by the end of the fifth to get trophies that you can shrine for equipment. Shrining more than one set will not get you more trophies.
You can still shrine them later, for a slightly less than precursor artifact return, but you won't get the trophies.
Some people keep the artifacts as collectibles after the event.