Gabara, Storm Conduit

Haste, First strike
{x}{x}{t}: Put X Lightning counters on Gabara,
Storm Conduit.
{r}{u}{t}: Remove X charge counters from Gabara,
Storm Conduit. Gabara deals X damage
target creature.
At the beginning of your end step, each
opponent takes damage equal to the number of
Lightning counters on Gabara.