Hades, Lord of the Dead

Lifelink, Ward — Sacrifice two creatures or a legendary permanent.

If a permanent an opponent controls would enter the graveyard from any source, exile it instead. You can cast that creature at any time using any combination of mana.

When a creature under your control dies, you may flip it over. It becomes a Swamp. If you don't, you may choose to return it to your hand instead of the graveyard.

Partner with Persephone, the Dread Queen.