Velria, Lurking Isle

Trample
{t}: Add {u} or {g}.
Velria, Lurking Isle enters the battlefield tapped
with six root counters on it.
Whenever a Merfolk or Octopus enters the battlefield under your control,
remove a root counter from Velria and give the creature a +1/+1 counter.
As long as Velria has a root counter on it,
it's a land.