Temporary Binding Vows Made: Vows made in the heat of the moment that were not permanent. You don't need to remember these.
Vow #1: Changing Conditions for Technique Activation.
When Futago copied Kuroda's ability to rotate someone 90 degrees. He also needed to copy the condition for that ability. Kuroda activated the ability needed to rotate a face of his rubik's cube body. Since Futago doesn't have a rubik's cube body, he made a binding vow.
He would activate the ability by rotating his hand in the direction that he wanted his enemy to rotate.
Vow #2: Decreasing time between Technique Activation.
Specifically for the Rotation ability from Kuroda. There was a limit in how fast Kuroda/Futago could spam the ability. So Futago made a vow to use more cursed energy in exchange for the time between activations to be decreased.
Essentially, allowing him to spam the technique more.
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Permanent Binding Vows Made: These ones should be remembered.
Vow #1: Increasing Memory Slots
Originally the protagonist could only 'memorize' 1 phenomena. So he made a vow to enhance his memory slots from 1->3. Going further would risk causing damage to the brain he wasn't willing to take.
By making a vow, he allowed different parts of the right prefrontal cortex to store abilities from his technique. Using an ability further from where the original slot was stored in the brain takes more cursed energy to activate the technique.
Slot 1: Original Cursed energy needed for the phenomena to manifest.
Slot 2: +40% extra cursed energy needed for the phenomena to manifest.
Slot 3: +60% extra cursed energy needed for the phenomena to manifest.
Vow #2: Eidetic Memory
Previously Futago could change whatever was in a memory slot whenever he wanted with no restrictions. However the ability 'memorized' would be forgotten naturally within 2 weeks of it being copied.
[If you're reading this you aren't a true JJK. Because it means you actually read, and bothered to read through all the rules]
So he enacted a Vow, in exchange for locking into abilities for 1 year, he would never forget an ability unless he chose to free up a memory slot.
Essentially he can't swap whatever is in a memory slot for 1 year. In exchange he can remember the ability for as long as he wants. Until he decides to get rid of the ability to take another.
Bonus: Won't forget an ability for as long as he wants.
Downside: Can't swap whatever ability was copied for at least a year.
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I'm going to explain this vow very soon. It was made over the timeskip after Jason
Vow #3: Self Mirror …