Alastrous,Harbinger of the End

Flying, lifelink, deathtouch
When Alastrous, Harbinger of the End attacks, shuffle 5 cards with different converted mana
costs from your graveyard back into your library,
then take an extra turn after this one.
{4}{p/u}{p/b}: Exile a permanent from your graveyard,
then Exile target permanent of the same type.
When Alastrous dies, you may pay {p/w}. When you
do, destroy all artifacts, creatures, and
enchantments.