tahu uses vahi on kal and cube, onua uses pakari nuva to obliterate cube and gain powers back.
kal launch krana at bahrag, one hits and turns silver, but is zapped by toa's powers.
toa use powers to blow up kal and seal chamber.
makuta regains stregnth from energy releaed by vahi and cube.
are discovered and rahkshi are unleashed (unlike the link in my sig)makes sense, right?