Choose target creature. Mill three cards, then put a +1/+1 counter on that creature for each creature card in your graveyard. (To mill three cards, put the top three cards of your library into your graveyard.)
Choose target creature. Put the top three cards of your library into your graveyard, then put a +1/+1 counter on that creature for each creature card in your graveyard.
So long as death follows life, the supply lines of the Sultai will never be cut.