Dwarf Spelunkers

Dwarf Spelunkers can only be blocked by
creatures named Dwarf Spelunkers.
{5}{r}, {t}: Destroy target non-island land.
If Dwarf Spelunkers enters the graveyard from
the battlefield, you may pay {r}{r}{r}, if you do,
return Dwarf Spelunkers to the battlefield with a
-1/-1 counter on it for every time Dwarf
Spelunkers has been in the graveyard.