Until January 8, 2023 at 3:59pm PST / 6:59pm EST (23:59 UTC), another special Tera Raid Event is live, this time featuring two cool Dragon-type Pokémon that are each version-exclusive: Hydreigon in Pokémon Scarlet and Dragapult in Pokémon Violet.
You’ll be able to find these in 4- and 5-star Tera Raid Dens, and you’ll be able to tell that they are event Dens due to having a light glow around their borders, making them easy to spot on the map.
These come in a variety of Tera Types, although with a slight bias towards Steel for Hydreigon and Dragon for Dragapult. These remain version exclusive, so these are Pokémon you would normally be able to find in your own version, however these also provide a great opportunity for you to join online raids with players playing other versions, as they might host their own raid for a Pokémon you don’t have access to in your version, such as Hydreigon if you’re playing Violet or Dragapult if you’re playing Scarlet.
Otherwise, it is important to note that these Event Tera Raids do not drop any Herba Mystica, so if you’re looking for those, you’ll want to try other places. Serebii has a listing of what each of them drop along with what their moves are.