Maxima Fourse

Giant Slayer (Whenever this creature assigns damage
to a giant, it deals double damage instead.)
Other Kithkins you control get +1/+1.
{4}{r}{r}: Monstrosity 6 (If this creature isn't
monstrous, put six +1/+1 counters on it and it becomes monstrous.)
As long as Maxima is monstrous, it has double
strike and rampage 2.