Jurno, The doom bringer

Jurno, The doom bringer enters the battlefield with 7 crush counters on it.
{1} Remove a crush counter from Jurno: It deals damege equal to its power to target creature.
Jurno, The doom bringer cant attack or block unless it has no crush counters.
{r/g}{x} Target creature gets +x -x and gains trample until end of turn.