Slinger Bacterium

Flash, intimidate, vigilance
This creature can't be blocked or take damage
while blocking if it's total power and toughness is
15 or greater.
{10}: This creature takes 10 less damage when
blocking.
"We found it on mars, kind of bumbling along.
This is why we called it the Bumblemorph. And
what a deadly electric slinger it has, too."