Talk:Weapons/@comment-2600:1702:4AD0:E870:7CAD:9EDB:988A:5773-20190407135115/@comment-140.146.159.241-20190410181030

You get weapon slots from leveling up your over all Mastery Rank otherwise you have to buy them with plat. You need to sell old weapons you dont use to get your slots open. Realistically, there is no point in collecting every weapon until late game when you have extra plat and slots. As for opening void relics you play on missions specific for opening void relics. Events are stated in your mission menue.

Hope it helps!