The Well of Existence

Not to be confused with Well of Eternity.

The Well of Existence
The Well of Existence Major Power: Refreshment 100 yd range 15 sec cooldown Instant Release all healing stored in The Well of Existence into an ally. This healing is amplified by 20%. Minor Power: The Well of Existence Passive 15% of your overhealing is stored in The Well of Existence. When you heal a target under 40% health, the Well releases up to 1371 of its stored healing into them.
Requirements
Classes	Druid, monk, paladin, priest, shaman
Role	Healer
Properties
Rank 2	Refreshment's released healing is amplified by 50%. The Well of Existence now releases stored healing whenever you heal a target under 50% health.
Rank 3	When using Refreshment, the Well will not release more healing than needed to fully heal the target. When The Well of Existence contains less than Y healing, it absorbs healing twice as quickly.
Rank 4	The Well of Existence gains an enhanced appearance.

The Well of Existence is an Azerite Essence obtained through the Rustbolt Resistance reputation faction. This essence can only be used by healer specializations.

Source

• Rank 1 is learned from Reactive Existence Battery, purchased for 2  [S.P.A.R.E. Crates] and 1  [Galvanic Oscillator] from the Stolen Royal Vendorbot in Rustbolt. Requires Friendly with the Rustbolt Resistance.
• Rank 2 is learned from Enhanced Existence Capacitor, purchased for 8  [S.P.A.R.E. Crates] and 4  [Galvanic Oscillators] from the Stolen Royal Vendorbot. Requires Honored with the Rustbolt Resistance.
• Rank 3 is learned from Calibrated Existence Gauge, purchased for 20  [S.P.A.R.E. Crates] and 8  [Galvanic Oscillators] from the Stolen Royal Vendorbot. Requires Honored with the Rustbolt Resistance
  • Players who have learned Rank 3 of The Well of Existence, [Nullification Dynamo], or [Purification Protocol] on any character have the option to purchase this item for 2,500 [Echoes of Ny'alotha] from MOTHER in the Chamber of Heart.
• Rank 4 is learned from Existence Vibrancy Display, rarely looted from  [Rustbolt Supplies], the Paragon cache for the Rustbolt Resistance.

Patch changes

• Patch 8.3.0 (2020-01-14): Reputation requirements to purchase ranks 1, 2, and 3 reduced to Friendly, Honored, and Revered (was Honored, Revered, and Exalted). In addition:
  • Rank 1 now costs 2 S.P.A.R.E. Crates and 1 Galvanic Oscillator (was 2 S.P.A.R.E. Crates and 2 Galvanic Oscillators).
  • Rank 2 now costs 8 S.P.A.R.E. Crates and 4 Galvanic Oscillators (was 20 S.P.A.R.E. Crates and 10 Galvanic Oscillators).
  • Rank 3 now costs 20 S.P.A.R.E. Crates and 8 Galvanic Oscillators (was 40 S.P.A.R.E. Crates and 15 Galvanic Oscillators).
    
• Hotfix (2019-10-04): The Well of Existence visual should no longer get stuck in the world.
  
• Hotfix (2019-09-10): Resolved an issue that caused Well of Existence to be affected by healing reduction effects more than intended.
  
• Hotfix (2019-07-19): The Well of Existence now becomes stealthed when its wielder enters stealth (e.g. Druids' [Prowl] or Rogues' [Shroud of Concealment]).
  
• Hotfix (2019-07-18):
  • The Well of Existence now despawns when the player who placed it logs out.
  • The Well of Existence's stored healing is now reset upon Arena and Battleground start.
    
• Hotfix (2019-07-12): The Well of Existence now floats near you while airborne on a flying mount and no longer interferes with having a Battle Pet active.
  
• Patch 8.2.0 (2019-06-25): Added.
  

External links

Rank 1	Rank 2	Rank 3	Rank 4
Wowhead	Wowhead	Wowhead	Wowhead