Lanefan
Victoria Rules
I really like the idea of different creatures having different types of night sight, with each not always working in every situation. It keeps night vision as a benefit while reining it in somewhat; also gives different species different roles and uses based on their current surroundings.Resurrecting this thread with a notation that ultravision did, contrary to popular belief, make it into AD&D 2E (sort of): see the ring of ultravision in the Encyclopedia Magica.