Two covers from a short-lived pulp called The Mysterious Wu-Fang. I couldn’t find too much about this magazine, although an entry in the Encyclopedia of Science Fiction does give a little background.

US Pulp magazine, seven issues September 1935 to March 1936, monthly, published by Popular Publications; edited by Edythe Seims working for Rogers Terrill. Intended to capitalize on the popularity of Sax Rohmer’s Dr Fu-Manchu, The Mysterious Wu Fang showed the “Dragon Lord of Crime” seeking world domination, sometimes using sf means in the attempt.

Our first cover, from October 1935, shows an instance of likely human sacrifice of a pretty woman:

For the second, we have an ISFDB entry and Jerome Rozen’s original cover painting, showing a lot of peril.

The cover in original context:

Both versions found at Pulp Covers.