The Ouroboros Knot
This particular occult method of tying a tie mostly resembles a Trinity Knot, with two differences. The first is that the tie is given one twist in the back, to make it something not entirely unlike a Mobius Loop (ties used for Ouroboros Knots are typically the same color on both sides, in order to disguise this). The second difference is the large amounts of magical energy that are pumped into the tie as the Knot is being tied. When correctly done, the Ouroboros Knot is activated and will hold its ‘charge’ for at least a week.