Razorwings is a conversion from the 2nd Edition Expansion. You will need that expansion to use the Razorwings unit.
The archive includes the Razorwings card, the Cavern Terrain card and the Falling skies, Hidden Threat and Night Hunter Lore cards.
These cards are designed to be printed on cardstock and will create bridge-sized cards when printed. I suggest after cutting out the card, trace a battlelore card over the printed card and trim to size.
You can also upload them to The Game Crafter and print using their bridge-sized card option.