(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
Those are just characters, as Megabot, Baymaxs Healthcare Chip, and Heffalumps And Woozles all give you more options to play with, including banishing an opposing item from play, healing damage from your characters, or making it so a character cant quest during their next turn
The reason for that is due to the number on the card going above the official number of cards in the set
For Azurite Sea, every enchanted card follows the treasure map theme, with sepia colours and sketchy art styles that really stick out
Youre getting a handy discount and a strong creature to put pants on