I took an hour or two and drew some owls while watching the 7th Harry Potter movie. The black (it's actually dark purple) ink is in a Platinum Preppy refillable marker (I SWEAR BY THESE -- you just need the ONE and can keep putting ink in it) (https://www.gouletpens.com/collections/other-writing-instruments/products/platinum-preppy-refillable-marker-black?variant=11884751487019) and the green is in an extra-fine Lamy Al-Star (https://www.gouletpens.com/products/lamy-al-star-fountain-pen-bluegreen?variant=11884855885867).
