Mordred, Knight of Treachery

{x}{b/r}: Mordred, Knight of Treachery gets
+X/+0 and gains first strike until end of turn.
Threshold - Mordred, Knight of Treachery gets
+1/+1, and has "{2}{w}, {t}: Search your library
or graveyard for a card named Clarent, Radiant
Royal Sword, reveal it, and put it into your hand.
If you searched your library this way, shuffle it."
There is no shame in running. For your
opponent is I, Mordred!