Dungeons: Add Phoenix Down Drops

[Veritas-Ancora]

I think there needs to be some way to educate players into owning/buying Phoenix Downs. Whenever the healer dies and I mention it most people seem confused or didn't know it even exists.
(I also wish it didn't share a recast time with healing potions, but that's just me)

I'm also confused why it shares a recast with healing potions.

That should not be the case.