Primal Dialga, Time Eraser

Trample, Menace, protection from Planeswalkers
Primal Dialga, Time Eraser enters the battlefield
with 10 time counters.
{1},{t}: Remove a time counter from Primal Dialga,
Time Eraser if there are no more time counters on
Primal Dialga, Time Eraser destroy all other permanents.