Obtaining mana by element only applies to heroes that are 5-stars or higher:
Fire: 1 mana is created for ally or enemy hero's critical attack.
Frost: 1 mana is created for ally or enemy hero's successful block.
Nature: 1 mana is created when HP is at 30% or lower on your turn.
Machine: 1 mana is created when HP is at 80% or higher on your turn.
Light: Permanently possess 1 mana if all allies are have survived when the turn comes.(Cancelled when any ally dies)
Darkness: 1 mana is created for each defeated ally heroes on your turn.
Attack Type, Chaos Type: 1 mana is created when you successfully hit a basic attack.
Defense Type, Support Type: 1 mana is created when an enemy attacks you.
A unit with the Break status due to the break of Guardian Stone will be immobilized for 7 turns, will receive doubled final damage, and will also get an additional effect by the element of last broken Guardian Stone.
Effect by the element of the last broken Guardian Stone:
Fire Guardian Stone: All damages will be turned into critical damages.
Machine Guardian Stone: Break status will be prolonged for 5 more turns.
Frost Guardian Stone: All damages will ignore Defense.
Light Guardian Stone: Attacker recovers Health by 30% of damage dealt to the target of break
Nature Guardian Stone: The target of break will receive damage each turn relative to their maximum Health.
Darkness Guardian Stone: 1 mana is created for the attacker.
Freeze / Stun / Confuse / Paralyze / Shock / Petrify: all actions are disabled while the effect lasts
Silence: skills are disabled while the effect lasts
Blind: all attacks miss while the effect lasts
Sleep: all actions are disabled while the effect lasts (effect ends when attacked)
Provoke: target only attacks the caster while the effect lasts
Instant Heal: instantly heals the target’s health
Heal Over Time: heals the target’s health over the specified number of turns
Damage over Time
Poison / Bleed / Bum / Frostbite / Corrode / Curse: characters take damage during turns while the effect lasts
Invincibility: grants immunity to all attacks while the effect lasts
Physical Immunity: grants immunity to physical attacks while the effect lasts
Magical Immunity: grants immunity to magical attacks while the effect lasts
Status Effect Immunity: grants immunity to status effects while the effect lasts
Remove: removes status effects from target
Mana Bum: removes the specified number of mana stacks from target
Cleanse: removes debuffs and damage overtime effects from target