The Scorpions 12.14 (86) defeated the Zebras 10.7 (67) by 19 points at Casey Fields on Saturday.
Casey will now play Werribee in the first qualifying final at Casey Fields next Saturday.
Casey trailed at quarter-time and three quarter-time before bouncing back victory.
Ruckman Mark Jamar returned from injury and shone with 38 hit outs, while midfielder Brent Moloney had 10 clearances.
Versatile tall Jack Fitzpatrick booted four goals, while Josh Tynan, Jordan Gysberts, Jai Sheahan and Matthew Bate chipped in with one major each.
James Magner, Moloney, Tynan and Gysberts had 24 touches apiece.
Casey trailed at quarter-time and three quarter-time before bouncing back for a 19-point win.
