"Passive: Mana has Thunder Energy as a source to boost her playstyle. Ranging from 0 to 100 pointsshe builds 1 point per basic attack. Skills don't decrease your Thunder Energy points and you lower enemies thunder resistance by 0.6% per Thunder Energy point when you hit them. Every Thunder Mark represents 20 Thunder Energy points and you start losing 5 Thunder Energy points after not attacking for more than 5 seconds."