I don't have History prof, but I do have the maneuver that lets me add a superiority die to a History check, so I'll assume that counts if Jack of All Trades does.
1d20 (6) + 4 + 1d10 (10) = 20
It does indeed!
Worship of the Olympian pantheon (and the Mulhorandi Pantheon) was brought to Aber Toril around -5000 DR by the Imaskari Empire, after they opened planes to other worlds and brought in captured slaves from other planes to build their empire.
At least one of the Olympian deities (Tyche) became an established member of the Netherese pantheon.
Speaking of Netherese, the language on the Orrery is Loross, written in the Draconic script. It's the ancient high language of the lost empire of Netheril.
I got a pretty good roll on religion so I think I succeeded:
Religion: [19]+7= 26
The Olympian pantheon are largely regarded as 'interloper deities' on Aber-Toril, however at least one (Tyche) was an established member of the Netherese Pantheon, before she herself split into the two Faerunean deities of Tymora and Beshaba during the Dawn cataclysm.
As the name suggests, their divine realm is Olympia, and Hermes is their herald; a divine messenger.
The dogma of the Gods of Olympus recounts a 'time before time' when beings known as Titans ruled the cosmos, before those beings were cast down and the Gods took their place. The Olympians are on friendly terms with the Seldarine, and a few of their Gods are also allied with other Faerunian Gods (Haepheastus is allied with the Dwarven God Dumathoin).
They otherwise have a limited influence on Faerun.
I'm also going to cast detect magic through my staff (since I'm casting through a magic item, the spell requires no components including verbal or somatics. Essentially, its a (Subtle) detect magic). If I do not sense any noteworthy magic like illusion, transmutation, or divination; I will immediately bow and,
Concentrating on the power of the staff, you peer into the weave in your immediate vicinity (30') and after a few seconds can tell that the Orrery detects as Divination magic.
In addition, the weave pools very...
strongly around Laerel. It's almost as if she is (in some way) comprised of magic itself. Laeral has a strange silvery aura that you have never seen before, and the weave around her appears almost perfect.
You've heard rumors that Laeral is a supposed 'Chosen of Mystra'; perhaps this is what that looks like?
She smiles at you knowingly as you glance in her direction with your spell active, and you feel a connection through the weave as she does so, as though she inherently senses what you're doing.
assuming I pass the check, say: "Great Hermes. It is an honor to be in the presence of the herald of the gods. There must be a great disturbance if one such as yourself is formally tasking mortals personally."
He smiles at you; a grin that you feel would otherwise be one of mischief, but somehow conveys a sense of deep concern, and then he speaks:
'Greetings to you Lady Galvich (he turns to the other PCs) Lady Ellina, Lords Asa, Bartholomew and Alvin.'
''You are correct, in that a great disturbance is at hand (he motions towards the slowly rotating Orrery, with its seemingly malfunctioning orb). A disturbance that could lead to a cosmic unbalance akin to the Sundering.''
As the Herald of Olympia, I have been tasked to communicate this impending calamity to worthy Mortals. The Divine edicts of the Tablets of Fate prohibit direct interference by the Gods or their Chosen, so the task at hand must instead be entrusted to heroes of legend.''
'Ideally my masters would have preferred a more subtle approach, but time I fear is of the essence.'
At the mention of the Sundering, you all pause. The Sundering (and the Spellplague that followed it) wreaked great havoc in Faerun, and indeed across all of reality. Millions (billions; probably even trillions) died, and magic, the planes and even reality was reshaped.
'It seems as if the Titans have found a way to defy the edicts of the Tablets of Fate.'
He pauses for questions, giving you all a chance to soak the above in.
(If you have any questions you wish to ask as he pauses, or wish to make any skill checks, ask away, otherwise I'll continue in a bit)