Requires

Champion of the Perished must be on the battlefield. Ghave, Guru of Spores must be on the battlefield. Ashnod's Altar must be on the battlefield. Maskwood Nexus must be on the battlefield. A creature you control has a +1/+1 counter on it. Mana needed:

Steps

1. Activate Ghave by paying and removing a +1/+1 counter from a creature you control to create a 1/1 Saproling creature token.
2. Champion of the Perished triggers, putting a +1/+1 counter on itself.
3. Activate Ashnod's Altar by sacrificing the Saproling token, adding .
4. Repeat.

Results