I have this magic system in mind that I'm having a small problem visualizing exactly how it could be too dangerous to the caster if they're not careful or how it could be too powerful. I've labeled it as wizardry for now for lack of a better name. It essentially needs to be unlocked with either years of devotion to meditation or nearly lethal levels of mind-expanding narcotics which then grants that person access to a state of higher consciousness that they can enter/exit at will, marked by the glowing of their eyes, and with the length of time that they're in it increasing their fatigue, eventually making them pass out from exhaustion. A tiring mind over matter kind of thing basically.
While in this state they have the ability to record observed events or personal actions, simple example being their jump raising them up by X distance, and make that event/personal action happen again/replay it at will without them needing to actually jump again. In short they briefly levitate. The limiting factor is that they can't replay the same event more than once, so in order to levitate higher they need to stockpile an amount of events where they jump and then replay them one after the other to levitate higher and higher. A more complex example is that they can open a door through any wall by recording themselves opening a door beforehand, basically moving a section of the wall like they would a door, with the thickness of the wall being 'opened' being the same width, depth, and length of the door they opened. That covers personal actions.
When it comes to recording the events of observations they could observe a fire burning, allowing them to replay that fire later on when/wherever they wish. This allows things like fire spells, or explosive spells if they observed a stick of dynamite exploding, or cold spells if they observed something freezing, or lightning bolt spells if they were close enough to observe the impact of the strikes during a storm. Replaying events of observations are also limited by the one-replay-per-observation rule. The observation needs to be directly observible on their scale in their vicinity in order to allow them to fully observe what exactly is happening, in other words they can't simply look at the sun and cause a solar mass of nuclear explosions, at most observing the sun would allow them to create a blinding flash of light.
You can't record and replay at the same time, and replays of both personal actions and observations can only be done one at a time, in other words they can't replay their jump raising them up while replaying a burning fire, no high-flying fire-flinging wizards, unless they kept themselves aloft between each burning replay that would have them fall a little bit each time.
How could this magic system be dangerous to the caster and how could they exploit it to become unstoppable?