Pretty much the idea is this:
Similar to vehicle creation. Allow for creatures to be HUGE ala indie film Monsters. Nothing more than 8 tiles for sanity and reality bubble reasons. But seriously. Blobs that link up! Fleshy mutants that got fused together ala Vampire:the masquerade flesh crafting.
Alien like other dimensional critters that are just big!
Stephen King’s The Mist story or film. Monsters, Monster The Dark Continent. Good examples of size.
Also really does follow our little game with blue gates. Plus a tactical OH $h!T moment when confronting such things lol