a skill
to go to the heart of the thing―see into the heart of the thing―penetrate into the inmost heart of the thing
in sumo, a wrestler who is good at the technique of pushing his opponent out of the ring while holding the opponent's belt
His skill is astonishing―amazing.
any art that invokes supernatural powers
to make a diligent application of oneself to something
The competitors' strength and skills are put to the test.