Undoing the demonization and returning to my normal appearance, I can finally relax.
Things turned out to be easier than I originally thought. Truth be told, I wasn't sure of the power level of the guy I'd just killed, but I reckoned it wouldn't be too much, since my alternate self got to know the original body and I knew that his clones, made with a bit of divinity, weren't that powerful.
But to me, they could have been a real threat, so I prepared myself to the fullest. First I had asked Elena to, at some point during the bounty claim, hide me with a spell imbued with her blessing, which made me undetectable.
Once, hidden I immediately activated the doppelgänger ability, which I now controlled completely with parallel thinking, and used morphogenesis and the change took place without anyone noticing.