Grandparent

The  is a Boss Monster introduced in the Anniversary Update of Risk of Rain 2. Being a Boss, the Grandparent may be encountered after initiating a stage's Teleporter Event. It can otherwise spawn naturally during higher difficulties.

Rock Throw
The Grandparent throws a large rock at its target, dealing 300% damage and high knockback on impact. The rock is destroyed if it collides with any solid obstacle, splitting into 5 smaller rocks that deal 7.5% damage each.

Gravity Orb
The Grandparent launches a slow-moving orb at its target, which persists for a moderate duration. Any player caught in its gravity well will be pulled toward the orb. This orb (and its gravity well) can pass through all obstacles. Players should avoid being caught by these orbs in certain levels as they can result in being dropped into bottomless pits.

Solar Flare
At 50% health and below, the Grandparent prepares a star-like orb above its head, which creates an enormous sphere of heat for 14 seconds. Any entity (friendly or not) caught in its large area of effect that does not take cover (except for and Grandparents) gets a stack of the  debuff every tick, multiplying the damage taken from the  debuff by (Overheat - 4), with a minimum of 1x. The duration of Overheat is longer the closer the victim is to the Grandparent, and old stacks are refreshed when a new one is applied. Additionally, if a victim has at least 4 stacks of Overheat, the solar flare inflicts a stack of Burn every tick.

Loot
Main Article: Planula

If the Grandparent is the Teleporter Boss, there is a 15% chance for the Uncommon item (that drops as a reward for defeating the Grandparent) to be replaced by its Boss item, the.

Tips

 * Solar Flare is the Grandparent's deadliest attack by far. Since it can only use it below 50% health, the player should focus on killing Grandparents one at a time if there are multiple present.
 * It may be tempting to fight Grandparents at close range, since they do not move and possess no melee attacks. However, Rock Throw and Gravity Orb become harder to dodge when near the Grandparent, increasing the likelihood that the player will be knocked away long distances and take heavy fall damage. The Solar Flare also becomes extra-deadly at close range, since it is harder to escape from and inflicts Overheat for a longer duration.
 * The Grandparent's Solar Flare attack starts out almost harmless, since Overheat does nothing on its own and the attack does not set the player on fire at first. If they fail to take shelter, however, the player will find that the damage builds up quickly, with every moment spent in the hot zone adding more Burn stacks and increasing their lethality.

Version History

 * Anniversary Update
 * Major Content
 * Added New Boss:
 * Added New Lore Entry:

Trivia

 * The Grandparent's spawn animation will launch players within it at a high velocity, in most cases off the map, so be careful when it is spawning. Being launched can result in severe fall damage or flying into the path of enemy attacks.
 * Prior to the Anniversary Update, an early version of the Grandparent was left unused within the game code with a vastly different appearance and skill set. It resembled a large, misshapen, two-headed Parent that was partially submerged in the ground. This Grandparent could create teleportation fields to bring the player within striking distance, as well as spawn eggs from which Parents would eventually emerge. It also had a different boss item, the, which gave the player a chance to spawn one of these eggs to distract enemies and summon allied Parents.