Hogwarts Legacy allows you to capture and tame dozens of magical creatures. However, you'll soon find out that the space in your Vivarium, a sanctuary for animals in the Room of Requirement, is quite limited. Thankfully, there's a way to remedy the issue somewhat, though it's going to take quite a bit of progression. Here's our Hogwarts Legacy guide to help you unlock all Vivarium biomes. These are, technically, the only way to upgrade the game's Vivarium mechanic.

Unlocking Vivarium biomes in the campaign

Just a quick recap: The default Vivarium in Hogwarts Legacy has space for 12 animals, but you're only allowed a maximum of 4 different species. As such, if a biome already has a Unicorn, Hippogriff, Thestral, and Puffskein, you won't be able to add something else, like a Giant Toad.

That means the only method to acquire a Vivarium upgrade is to unlock an entirely different biome altogether. This is done by completing Deek's sidequest arc.