And once again, if you companion it, it's very easy for a player to just point out it doesn't work
If you do, search your library for an artifact card with mana value equal to 1 plus the sacrificed artifact's mana value, put it onto the battlefield tapped, then shuffle
This works perfectly with an equipment-focused Samurai deck, letting you build up buffs on a single target, safe in the knowledge that Isao is always on hand to save them from removal
They clock a 0/3 body, have power equal to your artifact count to win fast with Commander damage, have first strike and vigilance innately, and then partner to combine into other colors or leaders, like Silas Renn, Seeker Adept or stay in color but power up with Ardenn, Intrepid Archeologist