Blind Well

The Blind Well is an endgame activity found within the Dreaming City and introduced in Destiny 2: Forsaken. The activity bares resemblance to other activities such as Escalation Protocol or The Court of Oryx. Players will use different tier charges (Tier I, Tier II, and Tier III) to summon an onslaught of Scorn. Every tier increases the power the Scorn have and the difficulty of the bosses.

Tier I
Tier I of the Blind Well has 5 rounds where the main goal is to defeat the enemies that spawn. Around round 2 and after, special enemies called "Servants of the plague" will spawn. These enemies have a shield that can't be damaged unless you get a buff called "Harmony". The buff is gained from killing special glowing enemies that spawn with the servant. The boss of the first tier is a Scorn abomination called "Herald of the plague" which also have a shield that requires the harmony buff to damage. After defeating the Herald, players will be rewarded with a low-tier chest similar to the ones you can find whilst patrolling the Dreaming City.

Tier II
Tier II is very similar to Tier I with the main difference being the increased power level and an additional Herald at the end. After defeating the two Heralds, the player is rewarded with a seemingly normal patrol chest, with the main difference being that it can drop a Seed of Light required to unlock the new subclass trees added in Forsaken.

Tier III
Tier III plays similar to the two other tiers with the main big difference being an increased power requirement and a new sort of boss. These new bosses are the different plagues and there are different ways to defeat each one of them. After defeating the plague, the player will be rewarded with powerful gear.

Lore
Not much is known about the Blind Well. Some of the lore tabs hint to it being the gateway into Mara Sov's throne world. It seems to have the power to drag beings from across realms into this area where both the light and the dark co-exist and seem to battle in some capacity mostly through the buff and debuff "Touch of the sky" and "Touch of the deep", where deep is meant to be The Darkness and the sky is the Light. Der Blinde Quell