FrogReaver
The most respectful and polite poster ever
How is Gillian immune to divination magic?
Nope. The moment he takes a long rest to regain any spell slots, he loses all his saved up slots and he's just a normal caster again. You're saying you're facing a spellcaster with only 5th level or lower spell slots (as many as he wants of them) or else a normal caster - he cannot be both. As soon as he starts casting those spells above 5th level slots, he never gets those back until he rests. It sure seems like he's trying to play it both ways but he can't.
And my invisible Assassin (from above) now knows exactly where to await his target, prepped to Alpha Strike him at the optimum moment.If the spells are over, he returns to his Temple of Gods for Short Rest.
Amulet of Proof against Detection and LocationHow is Gillian immune to divination magic?
I would say something like, div wizard 17 with a gem of seeing should do it. As soon as coffee starts firing off blasts go time stop > teleport > feeblemind >auto fail with portent. Though before any of that I would disintegrate his temple of the gods out of spite.
And my invisible Assassin (from above) now knows exactly where to await his target, prepped to Alpha Strike him at the optimum moment.
Spend some time scouting the vicinity, and he can place his allies to maximize THEIR Alpha Strikes also.
When you get that "Wizards are undefeatable because they can Spell everything" notion out of your head and begin thinking, you will see the possibilities.
Okay, by that I wonder. As your wizard will prevent your gem of seeing and material bag from be stolen before opening fire.
In this case, the villain remains stealth, casting Distant Minor Ilusions of himself or Sutble Spells. It will only appear when it is necessary. Will the attack be against Simulacrum?
The tactic would only work if you have some way to prevent it from being stolen.
Even if it works, Villain has access to Greater Restauration Spell. Feeblemind has no effect. And the Wizard would be without 9, 8 and 7 spells slots and close to villain and his simulacrum.
How to know the location of the temple?