Extra supply crates are obtained by exchanging certain items to Ignisia. Unlike regular supply crates, these only come with one roll on the drop table.
The items players can exchange are:
Note that players cannot receive these items from the exchanged crates, nor can they receive burnt pages or the Phoenix pet. Receiving a dragon axe is possible.
Handing in a full set of the pyromancer outfit (hood, garb, legs, and boots) will give players a supply crate with five rolls on the drop table. This is a bonus of one when compared to handing in the components individually.