Ghave, Guru of Spores + Sigil Captain + Phyrexian Altar

Ghave, Guru of Spores

Sigil Captain

Phyrexian Altar

How it works

1. Activate Ghave's first ability by paying 1 and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling creature token.
2. Sigil Captain triggers, putting two +1/+1 counters on that Saproling.
3. Activate Ghave's first ability by paying 1 and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling creature token.
4. Sigil Captain triggers, putting two +1/+1 counters on that Saproling.
5. Activate Phyrexian Altar by sacrificing a Saproling token, adding 1.
6. Repeat from step 3.