How Do You Revive Fallen Characters?

[Iscah]

I thought Phoenix Downs were meant only for deep dungeon use cus that was where the chests that drop them are found. They can be used in normal pve? My mind is blown.

You can't use them in battle and can't carry more than one into a dungeon, so their overall usefulness is limited, but if you find someone out in the field (or Eureka/Bozja) and don't have a way to raise them magically, it can be used in that case.