Short Answer 
In World of Warcraft: Wrath Classic, mounts are tied to specific classes, meaning the Crimson Death Charger is exclusively available to Death Knights, with no access for Priests. To obtain this mount, players must meet specific Death Knight achievements, reinforcing the class exclusivity in mount acquisition.
Step 1: Understanding Class-Specific Mounts
In World of Warcraft: Wrath Classic, mounts are typically tied to specific classes. Each class has its unique mounts that can be acquired through various achievements and milestones related to that class.
For example:
- The *Crimson Death Charger* is associated exclusively with the Death Knight class.
- Different classes, like Priests, have their individual mounts and cannot access those meant for other classes.
Step 2: Requirements for Obtaining Crimson Death Charger
The Crimson Death Charger is not available to *Priests* because it is contingent upon success in achieving particular Death Knight class milestones. This makes it necessary to reach specific goals that are only available to that class.
Key aspects include:
- The mount is earned through unique *Death Knight* achievements.
- Only *Death Knight* characters may progress toward the criteria needed for this mount.
Step 3: Class Exclusivity in Mount Acquisition
Since mounts in Wrath Classic are often class-specific, players need to play as the appropriate class to access certain rewards. Therefore, having a Death Knight character is crucial for obtaining the Crimson Death Charger.
To summarize:
- Only Death Knight characters can get the Crimson Death Charger.
- Priests must look for their own class-specific mounts and achievements.