Activate Ghave's first ability by paying ({1} magic symbol) and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling creature token.
Activate Ghave's second ability by paying ({1} magic symbol) and sacrificing the Saproling, putting a +1/+1 counter on Herd Baloth.
Herd Baloth triggers, creating a 4/4 Beast creature token.
Activate Ashnod's Altar by sacrificing the Beast, adding ({C} magic symbol) ({C} magic symbol) .