Lord Sargatanas, Demon Seraph

Flying Haste Double Strike Lifelink Menace.
Lord Sargatanas, Demon Seraph cannot be blocked.

As long as Lord Sargatanas, Demon Seraph
is on the battlefield, you must sacrifice one
creature or one basic land during your
upkeep, otherwise exile it.
As long as you or your opponent controls at
least one Demon, Angel,or Seraph, Lord
Sargatanas, Demon Seraph is Indestructible.