Honedge

Honedge is a Ghost/Steel-type Pokemon that first appeared in Generation VI, featured here as a common card in the 2016 BREAKpoint expansion set. While the Pokemon has a dedicated fanbase due to its unique sword design and evolution into the popular Aegislash, common cards from modern sets typically hold minimal collector value. The recent price volatility appears unusual for a standard common card from a widely-printed expansion that's less than a decade old.