Artemis, Goddess of the Hunt

Partner with Gods and Demigods
Trample
When Artemis enters the battlefield, another
target creature you control gets +1/+1, trample,
and "at the beginning of your upkeep, roll a dice.
If you get a 6, double the number of +1/+1
counters on this creature until end of turn."
{2}{g}{g}: Put a +1/+1 counter on each of up to two target creatures.