Abdu Maikaba’s men came into this game on the back of two wins against Go Round and Enyimba with a victory for them shooting them to the top four in the league.
The host began the game on a sound note as Aniekeme Asuquo almost gave them the lead in the second minute but his header to Ifeanyi Ede went wide.
Their persistence paid off in the 19th minute when Obata benefitted from a moment of carelessness from the visitors to drill home the curtain raiser.
Tornadoes bounced back to life after their deficit but were unable to beat the defensive network of the Promise Keepers as they were 1-0 down in the first half.
In the second half, Wassa a minute after being awarded Akwa’s best player by Dana Air doubled the lead as the Minna based team’s chance to grab an equalizer proved futile after Olorunleke saved Andrew Ikefe’s penalty.
Consequently, the Promise Keepers now sit second on the Nigerian topflight log with 38 points from 23 matches, while Niger Tornadoes stay sixth with 34 points from the same number of games.