Urborg, Tomb of Yawgmoth

Each land is a Swamp in addition to
its other land types.
"Only the remorseless dead center of the ice will serve to express their natures. As they denied
God's love, so are they furthest removed from the
light and warmth of His Sun. As they denied all human ties, so are they bound only by the
unyielding ice." -Dante