Reins of the Quantum Courser Mount in 10.1.5 Megadungeon

How to Get Reins of the Quantum Courser

One of the standout additions in World of Warcraft Patch 10.1.5 "Fractures in Time" was the Reins of the Quantum Courser. The mount dropped from Chrono-Lord Deios, the final boss of the Dawn of the Infinite megadungeon, which launched alongside the 10.1.5 update in July 2023. The drop rate sat around 1%, making repeated runs standard practice for collectors. Early recipients discovered that equipping the mount caused it to transform into Midnight's Eternal Reins from Karazhan, one of the first confirmed examples of a legacy raid mount surfacing through the Quantum mechanic.

How the Quantum Courser Mechanic Works

The Quantum Courser introduced a new mount system to WoW: rather than having a fixed appearance, the item transforms into a random mount from previous expansions. Each use grants the player a different past-expansion mount — giving collectors a path to mounts that had rotated out of the active reward pool.

Understanding the "From the Past" Feature

The "from the Past" descriptor on the Quantum Courser refers to mounts available in previous expansions or prior Tiers and Seasons but no longer obtainable through current gameplay. The confirmed pool included rare raid-drop mounts such as the Pureblood Fire Hawk from Firelands and the Living Infernal Core from the Emerald Nightmare — mounts that had been effectively locked behind discontinued content before this mechanic arrived.

Which Mounts Were Included

Community testing during Dragonflight confirmed the eligible pool centred on out-of-rotation raid and world boss drops from expansions prior to Dragonflight. Trading Card Game (TCG) mounts and Gladiator mounts from prior seasons were not documented in the confirmed pool. The defining pattern was: if the mount's original source was still actively farmable, it did not appear as a Quantum Courser result.

Duplicate Mount Protection

Player reports confirmed that the Quantum Courser did not award mounts already in the collection. Each transform pulled from the uncollected portion of the eligible pool, eliminating duplicates. Once a mount was added to the journal through a Quantum Courser transform, future uses offered a different selection.

Quantum Courser and Quantum Transmog Items

The Reins of the Quantum Courser shared its design philosophy with Quantum Transmog Items introduced in the same Patch 10.1.5 update. Both applied the same "random item from the past" principle; transmog pieces similarly transformed into older unobtainable appearance tokens. Players who ran Dawn of the Infinite for the mount also encountered Quantum Transmog drops that added legacy cosmetics to the collection.

Farming the Quantum Courser in 2026

With Dragonflight concluded and WoW now in the Midnight expansion (Patch 12.0.5), Dawn of the Infinite remains accessible via Group Finder as legacy content. The mount still drops from the megadungeon's final boss and the Quantum transform mechanic still functions — making it a viable target for mount collectors completing gaps in their journal. Players who want help with rare WoW mount farming can browse WoW mount farming services for boosted runs of current and legacy content.

Last reviewed 2026-06-17 against Patch 10.1.5 Fractures in Time — Maintained by WowCarry's WoW team.