Ringwraith

Deathtouch, Haste, Hexproof
When Ringwraith comes into play search your
library for a swamp and put it into play tapped.
Ringwraith can block any creature, regardless of
it's text.
{1}{b}{b} Ringwraith gains unblockable until the
end of the turn.
When Ringwraith dies, you may pay {p/b}{p/b}{p/b}{p/b}{p/b}{p/b} if you do regenerate Ringwraith and it
gains flying.