Activate Ghave's second ability by paying ({1} magic symbol) and sacrificing Young Wolf.
Young Wolf's undying ability triggers, returning Young Wolf from your graveyard to the battlefield with a +1/+1 counter on it.
Young Wolf enters the battlefield triggering Corpse Knight, causing each opponent to lose 1 life.
Resolve the Ghave ability, putting a +1/+1 counter on Cryptic Trilobite.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding ({C} magic symbol) ({C} magic symbol) that can only be spent to activate abilities.
Activate Ghave's first ability by paying ({1} magic symbol) and removing a +1/+1 counter from Young Wolf, creating a 1/1 Saproling creature token.
The Saproling token enters the battlfield triggering Corpse Knight, causing each opponent to lose 1 life.
Repeat.
Results
Infinite +1/+1 counters on creatures you control.
Infinite colorless mana that can only be spent to activate abilities.
Infinite colorless mana that can only be spent to activated abilities.