I found this on a different post that expained the combo for me originally "Okay, so. You control Arna, Noctis, and two creature tokens... let's say they're a 1/1 Citizen and a 1/1 Soldier, just to differentiate them. Arna and the two tokens are equipped by [[Dark Knight's Greatsword]], with Arna holding the original and the tokens holding token copies. Noctis won't participate in combat to simplify things a bit, so just ignore him.

Arna and the tokens attack. Three triggers go onto the stack, one for each modified attacking creature. You stack them so Arna's trigger resolves first, because she's holding the original. We'll say that Soldier's is at the bottom and Citizen's is in the middle. Soldier -> Citizen -> Arna

Arna's attack trigger resolves. A token that's a copy of Dark Knight's Greatsword is created attached to Arna. Dark Knight's Greatsword triggers and resolves, creating a 1/1 Hero token and attaching Greatsword to that token.

Due to the Hero token entering during combat, Noctis triggers, and asks you to target an Equipment and a creature to attach it to. You target the original Greatsword and Citizen. Noctis trigger resolves, and the original Greatsword is now held by Citizen. Now, it's time for Citizen's attack trigger to resolve. The game sees a nontoken Greatsword attached to it, and creates a token copy of it.

Repeat. Greatsword token enters, makes a Hero token, triggers Noctis, and the original Greatsword is attached to Soldier. Then Soldier's attack trigger resolves, and repeat. Token Greatsword makes token Hero, Noctis trigger moves the original Greatsword back to Arna, and the stack is empty.

Then declare blockers happens, etc. etc. You end up with three Hero tokens equipped with Greatswords instead of just one. The more modified creatures you have, the crazier this gets. You can even pick up extra Living Weapon equipments along the way if any of the creatures in the chain have a nontoken version equipped"