Let's imagine we have a cold storage wallet that has multiple utxos inside of it and we have a master seed for this wallet.
If we want to spend from coldstorage but want to go first through a new wallet like a coinjoin hot wallet for example we have two alternatives: we could send one single utxo we are interestd in using to that hot wallet or even import the master key to the new wallet (not safe).
It would be very interesting to have a mini-seed of a single utxo from our stash that we could import in the hot wallet and use to spend that single utxo. This way we don't have to create a new tx towards the hot wallet, nor give up information like the whole stash or xpub or subsequent risks of hot wallet.
It would be great to right-click a single utxo on our coldstorage wallet and get the mini seed for that single utxo like another 24 words or 48 words.
Just an idea. Would this be possible?