As smoke suddenly emerges from where Yamato had shot the lightning,he knew Skulduggery was up to something.Seeing as Skulduggery didn't escape upwards and that he couldn't go right nor left as the wooden spikes would prevent that.The logical thing is that he went down.
It then starts to rain,as no clouds were present,Yamato notices a disturbance in the earth.Expecting an earth based attack,he sends his own earth chakra into the earth and creates a blunt pillar that shoots him upwards,narrowly escaping the spikes.
While in mid air,Yamato focuses his Wind chakra in his stomach and releases a stream of wind that blasts him backwards (long range now).As he lands,he forms the Rat handseal and causes the earth itself to spiral inwards around the vicinity where Skulduggery last was.As Yamato deduced,if he is underground,the rubble would crush him/suffocate him.
"Don't test me,criminal."