Waterlogged Cave

Descend (When this card is put into your graveyard
from your library, you may sacrifice a land. If you
do, return this card from your graveyard to the
battlefield tapped.)
{t}: Add {u}.
"I still watch you when you're groovin'
As if through water from the bottom of a pool
You're movin' without movin'."
— Hozier, Movement