Nomad Stadium

{t}: Add {w} to your mana pool. Nomad Stadium
deals 1 damage to you.
Threshold — {w}, {t}, Sacrifice Nomad Stadium:
You gain 4 life. (Activate this ability only if 7 or
more cards are in your graveyard.)
"Sometimes it takes a wrong turn to get you to the
right place."
— Ayli, Eternal Pilgrim