Are there any minor cards that increase the rewards during the Boss Rush? I've tried the greed card, hunter, dragon's hoard. Sometimes the reward chests randomly have extra materials in them and I can't figure out why. Im trying to farm Sheliak, and it would be great if I could consistently boost drops!
#Boss Rush rewards
sonic stream
tepid rivet
Try an apogean maleficent card, but only once the boss has been defeated. You need to get away from the chest to prevent it from activating, apply the card to the transmuter and activate the chest.