Random Number Generation

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Random Number Generation (also known as RNG) is a mechanic which determines the value of something through random chance. There are many abilities which make use of RNG in order to bring a certain degree of uncertainty to battle. In fights there are always things that a player must take extra care to plan for, including considerations which take RNG into account.

See Pseudo Random Distribution for a list of abilities which add an extra degree of controlled distribution to keep their random factor in check.

General RNG Mechanics[edit]

RNG Abilities[edit]

Hero Abilities
Hero Ability Chance
Chaos Knight Chaos Bolt Discrete chance between long weak bolt or short strong bolt
Reality Rift Discrete chance to be pulled close or far from the cast point
Phantasm Bonus Illusion Chance: 50%
Discrete position shuffle chance
Chen Test of Faith Discrete chance to be hit with a stronger or weaker attack
Clockwerk Battery Assault Discrete unit selection chance
Crystal Maiden Freezing Field Discrete blast spawn position chances within the area
Drow Ranger Marksmanship Discrete unit selection chance with Aghanim's Scepter upgraded split shots
Ember Spirit Searing Chains Discrete unit selection chance
Sleight of Fist Discrete unit selection chance
Juggernaut Omnislash Discrete chance to be hit with a stronger or weaker attack
Discrete unit selection chance
Lich Chain Frost Discrete unit selection chance
Luna Eclipse Discrete unit selection chance
Naga Siren Mirror Image Discrete position shuffle chance
Ogre Magi Ignite Discrete unit selection chance when Multicast
Bloodlust Discrete unit selection chance when Multicast
Multicast 2× Multicast Chance: 40% / 50% / 60%
3× Multicast Chance: 0% / 20% / 25%
4× Multicast Chance: 0% / 0% / 12.5%
Outworld Devourer Essence Aura Mana Restore Chance: 40%
Phantom Lancer Doppelganger Discrete position shuffle chance
Juxtapose Hero Chance: 40% / 45% / 50%
Illusion Chance: 8%
Shadow Demon Soul Catcher Discrete unit selection chance
Tiny Craggy Exterior Craggy Chance: 10% / 15% / 20% / 25%
Witch Doctor Paralyzing Cask Discrete unit selection chance
Unit Abilities
Unit Ability Notes
Spirit Bear Entangling Claws Entangle Chance: 20%
Alpha Wolf Critical Strike Critical Strike Chance: 20%
Giant Wolf
Harpy Stormcrafter Chain Lightning Discrete unit selection chance
Item Abilities
Item Ability Notes
Manta Style Mirror Image Discrete position shuffle chance

See also[edit]