-
You can manage & track your card collection and decks once you create an account and login.

If an effect puts a Weapon directly onto the battlefield without playing it, can I put Master Sword on a character that didn't have a Weapon?

Yes. As long as you're not playing Master Sword, its first ability won't apply.
Source: Wizards of the Coast (2020-05-09)    【Link to Ruling】
Tags: Master Sword