v1.2:

Increased the Boss's base health.

Increased the Boss's speed.

Mending elites now heals 1% of maximum health per second instead of 100%.

v1.1:

Reduced the number of enemies Legendary Tesla Sentry Coil can affect at once and its attack's base damage.

Risk of Rain challenge has now officially ended its Beta stage and has been fully released.

v1.0:

Removed the Boss's electro-stun immunity.

Increased Uncommon Adrenaline's chance to heal from 25% to 50%.

Decreased Uncommon Tesla Sentry Coil's chance to stun from 25% to 10%.

Adjusted visual effect restrictions.

Adjusted some item descriptions.

Beta v2.4:

Removed a damage resistance algorithm that was wrongfully applied on the Boss.

Beta v2.3:

Fixed sentry kills not being qualified for item drops.

Reduced the damage of Uncommon Hand Grenades' explosions.

Changed the visual effects of the Boss summon attack to be more visible.

Queen's health bar now disappear after 5 seconds of idling instead of staying permanently visible, so multiple health bars do not overlap with each other when there are multiple queens being dealt with.

Beta v2.2:

The boss and the queens can no longer take damage offscreen.

Beta v2.1:

Complete overhaul of the boss.

Beta v2.0:

Added a boss that can be defeated for a win.

Fixed some critical potential bugs.

Beta v1.3:

Picking up items from this challenge no longer drops equipped offhand items.

Beta v1.2:

Made some slight balancing tweaks.

Fixed some typos.