The 26-year-old Canadian was recruited from gold competitor Brynäs to replace Finnish star Michelle Karvinen who moved to Switzerland.
After an assist point in the 4-0 victory against last year's sovereign HV71 on Saturday, it really loosened up for Cava away against Gothenburg.
She scored the right cross behind the home goalkeeper Frida Axell twice in numerical superiority.
In the first period when she resolutely stepped in front of goal and in the third when she went free after a pass from Jenni Hiirikoski.
In addition to the goals, there were also three assists.
Finnish talent Viivi Vainikka, 18, also scored two goals for Luleå, where national team goalkeeper Sara Grahn kept a clean sheet for the second match in a row.
HV71 and Linköping won
Linköping defeated SDE 1-0 after Lene Tendenes scored the only goal of the match in numerical superiority in the first period.
By then, Linköping had had two goals conceded before that.
SDE's Lindsey Post, named the league's best goalkeeper last year, kept a clean sheet and saved 53 shots in the 4-0 victory against Djurgården last Saturday, but now got to see its zero crack.
HV71 came back after the loss against Luleå and defeated Modo 3-1.
Luleå and Linköping are so far the only full points after two matches, but Brynäs - who crushed Leksand with 7-2 in the premiere - will play their second match only on Friday, away against AIK.