$5 buy-in, so this may be for more serious competitors
Q: When did you get into One Piece cards
Japanese boxes typically retail around that range on the secondary market, meaning raw EV and box price tend to sit close to each other which is why collectors buy for the opening experience and the chance at outlier pulls rather than as a pure value play
while neither uses the tap symbol, they both have the type 'Mono Artifact' which by the rules of the time meant that they were tapped as part of their usage (and thus could only be used once in a turn)
Playing 4 Teachings in a 70-card maindeck gave me a 5.7% concentration of Teachings, which was almost exactly the same as running 3.5 copies of Teachings in a 60-card deck
That said, if an official Magic card being used in a tournament is bent, scratched, wettened, lightly charred, or otherwise marked in such a way that its inclusion in a deck is deemed unfair, a judge may grant a temporary proxy