# Diablo 4 Public Test Realm: Insights into Season 6 and the Vessel of Hatred Expansion
Since **September 4, 2024**, the **Public Test Realm (PTR)** for **Diablo 4** has been active, offering players the chance to explore new features and content set to launch with **Season 6** and the **Vessel of Hatred** expansion. Although many new mechanics and additions remain undisclosed, the PTR has unveiled some intriguing hints about what players may encounter shortly. Notably, there are compelling signals that players will confront a recognizable adversary from **Diablo 2**—specifically, **Mephisto**, the Lord of Hatred.
## Revival of Rune Words and Alterations to Level Caps
Among the most exhilarating mechanics returning in Diablo 4 is the **rune word system**, cherished by fans from Diablo 2. Rune words permit players to amalgamate specific runes within items to unleash potent effects, enhancing customization and strategy regarding gear. This feature was notably missing in the original launch of Diablo 4, but its comeback has been highly looked forward to within the community.
Additionally, the PTR has disclosed a major alteration in character advancement. **In Season 6, players will only level up to 60**, a shift from the current cap of 100. This change could streamline the leveling experience and place greater emphasis on late-game content, though the precise rationale behind this adjustment remains unclear.
## Season of Hate: A Confrontation with Mephisto?
The forthcoming season tentatively titled the **”Season of Hate,”** appears closely linked to the **Vessel of Hatred** expansion. The term “hate” serves as an essential hint, indicating **Mephisto**, the Lord of Hatred, as a pivotal character in the season’s narrative.
For those unacquainted with the backstory, Mephisto is one of the **Prime Evils** and the progenitor of **Lilith**, a major antagonist in Diablo 4. Though Mephisto has made fleeting appearances in the game thus far, he has not yet taken a leading role. Nevertheless, the PTR indicates this will alter in Season 6, with Mephisto and his followers becoming more prominent.
### Notable Features Unveiled in the PTR
Two thematic elements have come to light in the PTR, both suggesting Mephisto’s involvement:
1. **Mephisto’s Hatred**: In Season 6, players will encounter adversaries tainted by Mephisto’s Hatred. It remains to be determined if these foes will be entirely new or existing enemies from Diablo 4, now twisted by Mephisto’s influence. Speculation also suggests that some of Mephisto’s minions from Diablo 2 may reappear.
2. **Realmwalker Monsters**: A throwback from **Diablo 3**, Realmwalkers are large creatures that carry portals on their backs. Upon defeat, these portals—termed **”Hell Portals”** in Season 6—will activate, granting players access to unexplored areas and powerful buffs. This feature introduces an exhilarating element of exploration and risk-reward gameplay to the season.
## Speculation: The Comeback of the Cow Level?
One of the most captivating rumors circulating within the community is the potential return of the **Cow Level**, a beloved Easter egg originating from Diablo 2 and 3. This speculation has arisen due to the introduction of a new weapon named the **”Rusted Bardiche”** in the upcoming **Patch 2.0**. The weapon’s description notes it “stinks of manure,” which many players interpret as a wink towards the notorious Cow Level.
While there has been no official confirmation, the possible return of the Cow Level has sparked substantial enthusiasm among veteran series fans. If accurate, this would represent a nostalgic addition that could provide an enjoyable and challenging diversion from the core content.
## Mercenaries in the Vessel of Hatred Expansion
Another thrilling element featured in the **Vessel of Hatred** expansion is the capacity to **hire mercenaries**. Mercenaries have been a hallmark of the Diablo series, providing players with added combat support. Although specifics on how mercenaries will operate in Diablo 4 are still limited, their presence could greatly influence gameplay, especially for solo players seeking extra strength in challenging encounters.
## How to Join the PTR
The **PTR** will be accessible from **September 4 to September 11, 2024**. If you’re keen to experience the new features and get an early look at Season 6, joining the PTR is straightforward. Here’s how you can participate:
1. **Own Diablo 4 on PC**: The PTR is exclusively available to players who possess the game.