Once he alters the flask back, as he saw, originally, he notices the damage fading. He'll also note that those two, simple spells consumed a vast amount of his arcane energy, similar to using, and sustaining, a particularly potent beam of balefire.<br/><br/>The general rules, he discovers, is that things he observes must come true; if they do not, if they are changed in any perceivable way, he suffers a level of paradox. When he acquires a second level of paradox, he knows, before Gammon even informs him, as the sense of nausea and discomfort grow almost exponentially worse, though he'll find that affecting a single object more than once does not have a compounding effect, within a small time frame. The levels of paradox seem to be fairly sharp; one paradox, one level. "While having this knowledge is valuable, and while I will attempt to petition on your behalf, in this case, be aware that the more capability and knowledge you obtain with time travel, the less effort the Zelekhuts will expend to protect you. A mortal, ignorant of time combat is virtually immune to it, while a practiced and seasoned combatant finds themselves very vulnerable, as there may be nothing to protect them. That said, I would advise you continue your studies, as I am uncertain if the Zelekhuts can protect you from the marilith, should she attempt to attack you out of existence." He remains behind, more to ensure Draiss doesn't try anything too serious, suggesting that he attempt moving objects in adjacent rooms, with recordings of them, so that he does not have evidence of their being moved, and thus suffers less damage to himself.