Print runs in the single digits make these functionally one-of-a-kind
When you look beyond Standard, though, the card has been virtually unplayable everywhere else
One of the best floodgate Trap Cards is There Can Be Only One , which can bottleneck a Deck that uses multiple monster types
(If they're equipped to the same creature, the abilities of the equipped creature will also trigger three times.) An ability of the equipped creature that triggers when a card is put into a graveyard "from anywhere" triggers twice only if (a) a creature card was put into a graveyard from the battlefield and (b) The Masamune is still on the battlefield and attached to the creature with the relevant ability
For example, if a creature has toxic 2 and gains toxic 1 due to another effect, combat damage that creature deals to a player will cause that player to get three poison counters
it emphasizes reliability in payments, predictable promotional calendars, and compatibility across devices, all of which matter to players who want consistency
