So i used to just sell every size oil I got but apparently it is great for scroll of titanic (the water bubble it creates) and explosion radius. And here I was thinking it was just the size of your bullet.
Is there anything else the size oils apply to?
Endless Mode has always been something I wanted to see and I think a great way would be after beating the whole game with a character and bring the amulet back to the top, you unlock a village in the overworld with chests and weapons racks to mount your favorite weapons and possibly vendors and people to talk to (maybe they have quests where they want specific potions or wands brought back for a reward)
Now you can start diving into the depths again where the enemies are harder, you see more of the rare enemies and the layouts are now all expanded for more places to explore. Instead of capping the depth to 25, now it just goes on forever getting a random depth every 5 levels, while you hunt for quest items and upgrades for your various weapons and everytime you get tengus mask or the crown, you can change your subclass, or just sell it.
Whenever you want to come back to the village, you can just use the amulet to teleport you back home, but it needs to be charged by collecting essence making sure that you cant just teleport whenever. Going back into the dungeons are randomized again.
Thats my main ideas, but also I want to hear what y'all would add if we had an endless mode. I love my builds in SPD, I just wish I could keep them forever