Zonot Six Seadome

Zonot Six Seadome enters the battlefield tapped
with six depths counters on it. In each
opponent's end step, if they control five or more
tapped lands, remove a depths counter from it.
{t}: Add {g} or {u}.
{t}: Add {g}{u}. Activate only if Zonot Six
Seadome has no depths counters on it.