Happiest Mask

The Happiest Mask is a returning item in Risk of Rain 2.

When the holder kills an enemy, there is a small chance that a ghost of that enemy will spawn as an ally, with greatly increased attack strength. The chance for this to happen is affected by Luck.

The ghost inherits all behaviors of the original monster. The level of the ghost equals the "ambient" level of the run, not the player's level.

Ghosts do not take damage through any normal means; instead, their health drops by a fixed percentage every second. Each ghost lasts 30 seconds (+30s per stack), though this can be prolonged if they are healed.

Version History
Anniversary Update:


 * Added new lore entry.
 * Happiest Mask minions now scale to the 'ambient level' of the run.

Hidden Realms Update:


 * Ghost damage boost was changed from 300% ⇒ 1500%.
 * Ghost proc chance was changed from 10% ⇒ 7%.

Trivia

 * A ghost is actually the original monster with three special hidden items equipped. One makes its health deplete over time; ghosts are awarded 30 of these per Happiest Mask the user has. The second makes it appear and behave like a ghost, so that it is invulnerable to normal damage and becomes transparent. The third boosts its damage; the ghost is supplied 150 of these.
 * Because the time a ghost lasts is tied only to a damage-over-time item it receives, it is possible that ghosts can survive indefinitely because of their healing ability.