Circle of Thorns Druid

{r/g}, {t}: Put a basic land form your hand into the battlefield under your control.
{r/g}{r/g}, {t}, tap four untapped druids you control:
Search your library for a land, dryad, elemental,
plant or treefolk card, it enters the battlefield
tapped under your control.
A deck can have any number of cards named
Circle of Thorns Druid.