Both Iapetus AND his bravado will be going. He will, of course, be in his usual venturing gear, armor and mace et al. He seems content to let Attravere be the official leader and handle such entertaining things as provisions and transport.
Attravere would follow-up on Guillaume's suggestion, but by way of courier. (He intends to bounce back for supplies as necessary)
Knowing what is required to go there Attravere would feel the need to mention before the journey in a suitably embarrassed fashion, "I won't be able to enter the hill to collect vis unless one of you is capable of casting the necessary spells upon me." (Go go Muto deficiency!)
Sinmore left the Covenant in the morning, her armour underneath her oversized yellow gown. She's eating her breakfast (it looks like some bread and cheese) and has an enormous but exquisitely crafted sword strapped to her back. She gulps the last of her meal down and chases it with a mug of morning ale that she puts into a rucksack.
"So..." she says after wiping her mouth and wiping her hands on the gown. "Entering this requires blond hair and blue eyes? My father shall not like that." she grumbles.
((How big is the burrow entrance and what is the aura strength please? I need to add an additional magnitude for her size, so I need a 10 for a spell on herself, others need a 15 to cast on her. Right now Sinmore has like a 9 with her casting score before Aura and a roll))
Iapetus scratches at his chin for a moment as he appraises the situation, before speaking up. "I am able to change myself easily enough, and have potential to transform your appearance as well, Sodales," he tells Attravere. "If you would allow it."
Sinmore takes a few moments to gather her thoughts and then with a booming voice and exaggerated gestures she tries casting her spell. She nearly has to fight off a laugh as she can't help but think of a spell name; Creo Blonde.
((Spell casting total: +11 before Aura, she'll spend a Confidence if she needs to))
You don't see a burrow entrance. And you don't get the Aura strength without Intellego Vim.
I'm not sure you need to add a magnitude for size, since your hair isn't any larger than a normal person's, but by that rationale everyone would need a magnitude for Part, and that seems silly. Ok, Size magnitude it is.
Attravere and Iapetus are capable of casting the Personal range spell on themselves (Lv5) but neither of them has a snowball's chance in hell of pulling off a lv15 spont. Even ceremonially Iapetus has only a +17 and would need a roll of 13+ (and there is only a 4% chance of rolling a 1 followed by a 7+). It's only a lv10 for Sinmore to cast herself, but she'd need the same roll as Iapetus would, ceremonially. Looks like Sinmore has to wait outside
(I completely forgot about having to adjust for size, qc :/)
Sinmore pouts and frowns when it looks like no one can cast any spells to change her.
"Hummph, the story of my life. Too big to tag along. Ah well. I think I know now what should be my lab duty. Either making a spell or an item that changes the hair and eye color. One that could work on someone up to my size or William's size. I'll be out here with my little sister." she says as she pats the hilt of her sword. "I'll help where I can."
Iapetus and Attravere both manage to cast the level 5 MuCo to change their appearances, though both need to fatigue themselves.
Immediately they hear the sound of a bell ringing, and when followed, the two disappear into the hillside.
They find themselves within a long subterranean tunnel. There is only the faintest of light emanating from some kind of fungus on the walls. There are tunnels off to the right and left, and this passageway extends further down beneath the hill. Better light will be needed to explore the caverns; how will you illuminate the way?