Nova (Diablo IV)

Nova is a Mastery Lightning passive skill used by  in Diablo IV. Unlike the classic spell, it triggers automatically and is not directly controlled by the player.

In-game
Nova triggers a wide explosion centered on the character every time enough Mana is expended within a reasonable time period, cast in tandem with every spell that reached the Mana threshold. It has no cooldown, but obviously will not be as useful without a constant Mana flow (both recovery and spending).

Talents:

 * Potent Warding (5): Elemental damage and resistances are increased by 2% per point.
 * Devastation (5): Critical strike chance is increased by 2% per point.
 * Align the Elements (5): Mana cost is reduced by 5% per point.
 * Precision Magic (5): Elemental damage increases over time, up to a maximum of 5% per point after 3 seconds. Attacking resets this effect.
 * Inexorable Reach (5): Damage is increased by 3% per point against enemies outside of melee range.
 * Ceaseless Bolts (5): Lightning Critical Strikes increase Critical Strike chance by 2% per point for 5 seconds, up to 10% per point.
 * Overcharge (3): Lightning damage have a 3% chance per point to create Crackling Energy.
 * Convulsions (5): Lightning skills have up to a 2% chance per point to Stun enemies for 3 seconds.
 * Stagger (5): Enemies deal 4% less damage per point for 3 seconds after being hit by Lightning skills.
 * Crackling Aura (5): Deals Lightning damage to a random nearby enemy every 11 seconds (recharge time reduced based on allocated points).
 * Shocking Strikes (1): Each time your Lightning skills hit an enemy, they take 8% increased Lightning damage for 1.5 seconds, stacking up to 40%.
 *  (1): Lightning damage is increased by 40% against enemies within melee range.
 * Burning Resonance (5): Damaging a Burning enemy has up to a 25% chance to restore 2% Mana per point.
 * Frostbite (5): Damage against Chilled enemies is increased by 2% per point.
 * Endless Winter (1): Critical strike chance against Chilled and Frozen enemies is increased by 30%, but Chill effects no longer Freeze.