The Normal campaign and Challenge mode dungeon tokens are connected. If you got a token from a dungeon in a Normal campaign dungeon, you will not be able to collect tokens from the Challenge mode version of the dungeon (and vice versa) unless you refresh them.
DEF+ (buff): Affected target has a boost to DEF stat, reducing the amount of damage they take for the next 3 turns. Additional application of the effect refreshes its duration. The amount DEF boosted is based on the level of the skill. Energy gain (effect): The hero gains some extra energy, which is required to use their special attacks/abilities. Haste (buff): Affected target takes a second chance on their turn and has an increased Dodge chance until the end of the next turn. The Dodge chance is based on the level of the skill. Heal (effect): Some health (HP) of the target is restored, up to max health. Disease and other debuffs can lower the healing rate or prevent heal at all. The Skill (SKL) stat of the healer increases the heal effect. Constructs (except the Living ones) cannot be healed. There is a chance to score CRIT Heals that heal 2x the amount of a normal heal. An animation of floating green "+" signs indicate the heal effect. Regeneration is a similar effect but recovers a little health over time.
All allies heal [25/35/50]% of their maximum health when inflicted with Frozen. Enemy and ally skills inflicting Frozen on allies will trigger this effect. The gained health depends on rank (I-III) of this trait.
Melee physical attack on target enemy, OR heals target friendly construct, OR target ally gains a class-specific buff (Tanks get DEF+, Healers get CRIT+ and SKL+, Casters get +1 ENERGY, all others get ATK+.)
Assassins with Sifu on team cannot penetrate shields from Shielded buff with Sifu's Secret Technique but they ignore Invincibility shields (Gorgons) and Drakk the Warlord's Barbarian shield (from his Unbridled Rage ).