[Request] Cover up ideas / advice?

I have a dragon tattoo’d on my left upper arm, it’s approx 11 cm x 5 cm. I’m looking to cover it up but I’m not exactly sure what with.I have another tattoo which is my date of birth in Roman numerals along my right forearm and would like to use the Roman numeral theme in the cover up to add my kids d.o.b’s if possible. However, it’s not essential as I’d be happy to get that done elsewhere as a separate tattoo.Generally I’m looking for a random pattern type thing, something like a tribal half sleeve, or I’ve seen a few ‘mechanical’ ones that look good (gears and stuff)Here is what is to be covered:My tattoo: https://ift.tt/2LZRPkc close template to my tattoo: https://ift.tt/2LzD63l input and suggestions welcome. Thanks. https://ift.tt/2vhG5SQ