Groveway of Forebears

({t}: Add {g}.)
Groveway of Forebears doesn't untap during
your untap step if there are no creature cards in
your graveyard. When it doesn't, mill 1.
{r/w}, {t}, exile a creature or planeswalker card from
your graveyard: Scry 1. Then put either a +1/+1 counter on a creature you control or a loyalty
counter on a planeswalker you control. If the
exiled card is legendary, do both instead.