1. Magma for pve
Element for pvp
2.normal mode drops advanced bless too all modes do, here the difference between the 3
Normal- drops cards for level 41-50
Advanced-drops cards for 51-60
Hero- drops cards for 61-70 (note in hero mode if your level 70+ you will have a chance to receive legendary bless drops)
3.Yes Spiritual drop can be converted into basic element, basic element can be exchanged for either resist or attack boxes for any level depending on the amount of basic element you have.
In my opinion only hero mode is worth running as the spiritual drops from that dungeon has a high chance of being converted into basic element
Edited by Starkespada1, 18 November 2014 - 09:49 AM.