Degeneration Cannon
By combining 3 black holes through quantum channeling, we can create a 3-way universe in one Princess Castle size ball, one for temporary universe, one for universe destruction and one for universe recreation.
In a sense, just throw this to your lovable enemy, they will be trapped in a temporary universe, then destruction universe will fuse in and explode just like the Big Bang phenomena, then the recreation universe will cancel out both universes but recreate some of your enemy's debris for your keep sake
Infinity Cylinder
By using object time manipulation, we can just simply open this cylinder and trap those enemies inside. Then, by infusing an Age Spell with the nature of Time-Space rift in the cylinder, we can easily reduce them to nothingness
Akashic Access
A machine that grants temporary access to the Akashic Records (a real term coined by H. P. Blavatsky from a Sanskrit word, Akasa). You will also be able to manipulate the principle of causes and effect.
If you still don't understand, it basically lets you to rewrite, change or remove events of the past or add events to the time plane.
So all in all, you can make Equestria as if it never existed, have planets arranged like your grandma skin crest, make yourself born with godlike powers, have yourself a complex sister bonding, or auto have handsome face and all the ladies, any time, any where you like