Requires

Ghave, Guru of Spores must be on the battlefield. Tribute to the World Tree must be on the battlefield. Phyrexian Altar must be on the battlefield. A creature you control has at least one +1/+1 counter on it. Mana needed:

Steps

1. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling creature token.
2. When the Saproling enters the battlefield, Tribute to the World Tree triggers, putting two +1/+1 counters on the Saproling.
3. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control.
4. Holding priority, activate Phyrexian Altar by sacrificing the Saproling, adding .
5. Resolve the Ghave ability, creating a 1/1 Saproling creature token.
6. Repeat from step 2.

Results