Black DragonWyrm

Flying, First Strike, Menace
Black Dragon Wyrm can block creatures with
Menace alone.
{2}{b}: Black Dragon Wyrm gains Wither (This
deals damage to creatures in the form of -1/-1
counters.)
"Seek ye the Swamp Dragon, have your gravestone
carved first. Like all the others, it is all that is
likely to be left of you."