1 gram Pre Roll. Nitro Cookies is another rare strain grown at Delta Mantra. Crossed between Gasmask and Animal Cookies leaves the user feeling relaxed and happy with full body effects. This strain grows into dense, frosty green buds tipped with purple. True to its name, Animal Cookies has a sweet, sour aroma that will impress any veteran consumer. This potent medicine might be overkill for mild symptoms, but its ability to obliterate severe pain and insomnia is unprecedented.