The knife would have begun to undergo phasing the moment it was released from 8:30 PM. If you could read english, you'd be able to know that it'd be perfectly normal up until the day after that, 24 hours after, when it begins to fade, and another 24 where it destabilises into an unidentifiable one.>>790921
Stabbed at 8:30 PM, June 14. Time passes 3 hours 30 Minutes onto June 15. \\3:30
Court day one, 24 hours pass. \\27:30
Court day two, 9 Hours pass since prelogue. \\36:30
Court day two to present (since Lobby), 4 Hours 42 Minutes. \\41:12
That's a six hour 42 minute gap you have there when it BEGINS to deteriorate. "Erratic" is not a synonym of "instantaneous", it wouldn't have happened immediately after it crossed the mark, and it hasn't yet even.
>It is also possible that Rarity has used the spell to advance the decay of her aura, but was not fast enough to preform it completely.
I must be getting old, I can't hear the word "evidence" at all.