Where it comes from
The line in the source
pg=707 | hitCnt 78 | 強化拡張パック「爆炎ウォーカー」 | 2020年 4月24日（金） Explore / Figure
Record
Cards in set (card-search hitCnt), released 24 April 2020
78 cards Released 24 April 2020
ReportedReported by a reliable secondary source, or read carefully from filed documents.