Assemble the ingredients together, and you create a special key that lets you drop into a procedural instance where you fight, farm, and loot inside a generated space like a dungeon crawl. This would give us such a variety of things to fight other than typical meteor mobs.
My idea is like Diablo 3’s rift obelisk system, you put in a basic keystone, you go to a basic rift, but put in a Greater Keystone and you go to a Greater Rift where the challenges and rewards are greater. This feature is what keeps Diablo 3 alive to this day.
this would be great.
generated using a 1-plot-tile set (official + player made) - would require blueprint mechanic and some buttons/ wires
could be accessed the way you describe (higher tier) or found as a portal randomly spawned in nature (lower tier). also seasonal/ event dungeons