Takes some time to understand how the cards work with each other
For other purposes, however, if a card refers to your commander, it means either the legendary creature or the legendary Background enchantment
And also people who just got lucky in 6th grade
Theres a lot of sacrifice fodder available to throw -1/-1 counters around, and the proliferate ability can help you to speed up sagas, kill bigger creatures with the previous ability, and grow some of your own creatures
In practice, it isnt that hard to play them both together because you can usually find a third colored source to get it onto the battlefield, or enough pips early to use Nykthos for three colored mana, or else its just powerful enough with the three extra pips to be worth that minor inconvenience
Bristly Bill, Spin Sower allows you to pay 3GG (three generic mana and two green) to double the number of +1/+1 counters on all your Creatures