Complex sentence: Jim Bambra reviewed "Tomb of the Lizard King" for "White Dwarf", and gave it nine out of ten overall, calling it "a difficult adventure that was designed to test a party's mettle and playing skill".
Split into simpler sentences: Jim Bambra reviewed "Tomb of the Lizard King" for "White Dwarf". He gave it a nine out of ten overall, calling it "a difficult adventure that was designed to test a party's mettle and playing skill".