Hand of Fate 2

Equipment Tokens are the Tokens that you see on the bottom of weapons. Inspecting the Weapon will show you the requirements for completing the Token. The 3 starting Supply Weapons are probably the easiest for people to complete. For the starting Supply weapons once you complete each token you unlock a better version of the weapon. I haven't completed any other Weapon Tokens yet so I cannot confirm if all weapon tokens work this way.

As an example the Soldiers Sword requires you to Riposte 25 Northerners. Simply counter with Y then quickly hit X to do a Riposte. Once you complete 25 of these against Northerners, which are listed as Frost suit, you will unlock this token. Unlocking the Token removes the Soldiers Sword from your deck and gives you the Fine Blade which is an upgraded version.

Any 3 equipment Tokens will count but I completed the 3 Supply weapons first as they are available from the beginning and you can start a Challenge with them if supplies are available in that Challenge.