Towards the end of summer, one of the fishermen finds Sanno (the river otter, Maribus' familiar) collapsed on a riverbank. The little beast is brought to the covenant doctor, Chayyim, who sends word to each of the magi, by way of Daniel the messenger:
"The doctor says Sanno is dying but he can't find anything wrong with him. I mean, other than the fact he's dying. Physically he should be fine but he is dying all the same. Chayyim asks whether you might know any magics to help Sanno as he is in terrible pain and probably won't last a week at this rate. I'm to show you to the doctor's house if you can come."
The fat otter is not conscious, but he is thrashing about (Chayyim has secured Sanno's limbs to a cot for his own safety) and muttering nonsensically. Every now and then, Attravere makes out Maribus' birth name within the mumblings.
Yep. There are three cords extending from Sanno which are severed; his life essence is bleeding out of it. Looking at the peculiar way in which the cords have been severed, Rhodri realizes that the otter's life could be prolonged with constant Rego Vim to "staunch" the cords, but that would only sustain him until new cords could be forged to replace the broken ones.
"I cannot say whether or not his magus is still alive, only that the cords are broken. Most likely that is from the magus's death or final twilight, but it could be through ritual dispelling. Though Rego Vim magic could sustain him, he will eventually die unless someone else bonds with him."
"I suggest you use either Creo Vim or Rego Vim as a stopgap. Creo Vim to temporarily repair the damage to the old cords. Or Rego Vim to effectively seal them up. I won't be able to do so well enough myself."
((If I understand the 5th ed changes correctly, you wouldn't be able to use Creo Vim temporarily for the same reason that non-ritual Creo Corpus spells can no longer do temporary healing. Rego should still work just fine, though.))