While it doesnt have any triggers when dealing combat damage to a player (unlike other swords such as Sword of Fire and Ice), The Masamune supplies an additional benefit: If a creature dying causes a triggered ability of this creature or an emblem you own to trigger, that ability triggers an additional time. That was rather wordy, so its worth noting a few things: 1
How many tokens, we hear you ask
Finally, the Steel Puzzle celebrates strength and power, which brings together Glimmers like Stitch, the Beast, and even a knight version of Cinderella
No one wants to take that ability to the face, but the card is exciting for a build archetype that needed some more options in my opinion, though looking over the suggestions for Virtus and Gorm commander deck list might give some good tech, like Access Tunnel
Make a Treasure token