Binary Basin

Binary Basin enters the battlefield tapped, and
cannot be untapped outside of your untap step.
{r/g}, {t}: Flip 2 coins. If both land heads, Add
{g}{g}. If both land tails, Add {r}{r}. If one of each
is landed, destroy Binary Basin.
"No, don't drink that! You could die! Or you could
become immortal, but that's even worse!" — Monna
Swodd, faerie alchemist