Commands are broken up into three parts:
Cost is the amount of Loyalty to the streamer you are watching that will be spent using the command.
Fixed command parts must be typed exactly as shown.
Variable command parts will show a list of options you can choose from when you hover over them, or click on mobile.
Simply write each part out in order, with a space in-between. For example:
!buy loot twitch
Returns the amount of Piko you current have.
Purchase a random common vanity item for specified slot.
Purchase a loot crate containing a random item from specified theme.
Purchase a random colour for current item, if that item is dyeable.
Remove item from specified slot and put it into storage.