Last Wish is the second major raid of Destiny 2, introduced during the Forsaken expansion. The raid takes place in the center of the Dreaming City to prevent the Taken from corrupting the homeland of the Awoken. The activity serves as the final conclusion to the storyline of Forsaken.
The raid was added to the game on September 14th, 2018 at 1 pm EDT. The event has a Light requirement of 520, but enemies scale as high as 580 throughout the event.
Guide
Kalli, the Corrupted
Kalli is an Awoken Techeun who served Queen Mara Sov before being Taken by Oryx and transformed into a Taken monstrosity. She serves as the first major encounter in the Last Wish raid.
The raid begins with the Guardian fireteam arriving in a massive chamber that bears resemblance to the Blind Well. The area is outfitted with various platforms along with 9 plates around the area. Closer to the central pit, a collection of six icons in 3 pairs will appear. Heads (two-headed snake), Smile (a snake with a smiling face), Eight (a sign for Eight), and Infinite (the infinity symbol). One pair of icons will not be shown. Throughout the area, you can find a matching plate for each of the icon types. Each plate will have their symbol embedded near the plate. Each plate is divided into three portions. Two Taken Blight bombs will appear above two of the portions and will explode after about 8 seconds. Once they explode, they will appear in two new sections. Guardians must stand on top of the clear portion of the plate and defend as waves of Taken Thrall and Taken Psions will rush the area. Once a plate is held for long enough, a Taken Knight will spawn. Once the Knight is killed that plate is complete. Once all the plates have been completed, regroup with all players in the center of the room where the team can damage Kalli.
Kalli is immune during the plate stage of the fight and will warp to random plates while teams are capturing them and attack with blasts. Once all plates have been captured, Kalli will enter the room's center area conceive an ontological weapon. The fireteam must concentrate their fire to damage her during this 15-second window. Afterward, she will prepare to use the weapon which will wipe the team. While she is casting her weapon, look below her to the two rows of doors. These rooms will shield Guardians from her attack but each room can only fit one player. Wait for the doors to open, sprint inside them, wait until the attack is finished, then emerge. Kalli will rotate to each side of the center, above a new set of doors, and repeat the attack. After three attacks, the fight will return to the earlier phase and repeat.
The best strategy is to split the six-person fireteam into three groups of two Guardians. Players check the glowing icons and travel to their open plates. The icons will change after the DPS phase, so be sure to double check them before starting a new rotation. Cast any Warlock healing abilities or buffs in the center during the attack phase. During the second stage of the fight, Kalli can attack with a deadly area-of-effect blast if you enter melee range so be sure to keep your distance from her.