Killer Bee, Tailed Guru

{g/u}{g/u}: Put a +1/+1 on Killer Bee, Tailed Guru.
Activate this ability only once per turn.
Killer Bee can block an additional creature each
combat for each +1/+1 counter on it, up to a
maximum of eight additional creatures each
combat.
Killer Bee cannot have more than eight +1/+1
counters on it.