Hundred-Headed One

Flying
{3}{b}{b}{b}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it
becomes monstrous.)
As long as Hundred-Headed One is monstrous, it
has vigilance and can block an additional
ninety-nine creatures each combat.
"Hey, I know this one!"—The last words of a foolish knight.