Calendula

The Calendula frames are legendary among the House of Coals. There were only ever 20 available, but 4 have been lost. The 16 remaining are highly coveted and revered by those ranked among the House of Coals. To pilot a Calendula is to be held as an absolute expert in the field. The patterns have been unreplicatable despite the Houses best efforts, so the remaining frames are lovingly maintained. They are known for entering the field and returning unscathed.
The Calendula is typically reserved for indirect engagements to keep its legend intact and make use of its strengths. Many dread seeing the ghost of Calendula approaching them.