Activate Ghave's first ability by paying {1} and removing a +1/+1 counter from Ghave, creating a 1/1 Saproling token.
When Saproling token enters the battlefield, Woodland Champion triggers, putting a +1/+1 counter on itself.
Activate Ashnod's Altar by sacrificing Saproling token, adding {C}{C}.
Activate Ghave's first ability by paying {1} and removing a +1/+1 counter from Woodland Champion, creating a 1/1 Saproling token.
Repeat from step 2.

Infinite colorless mana

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Ghave, Guru of Spores

Woodland Champion

Ashnod's Altar

Put a +1/+1 counter on any creature you control.
Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
The Servo enters the battlefield, triggering Woodland Champion.
Holding priority, activate Ashnod's Altar by sacrificing the Servo, adding {C}{C}.
Resolve the Woodland Champion trigger, putting a +1/+1 counter on it.
Repeat from step 2.

Infinite +1/+1 counters on a creature

Animation Module

Put a +1/+1 counter on any creature you control.
Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
The Servo enters the battlefield, triggering Woodland Champion.
Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding {1}.
Resolve the Woodland Champion trigger, putting a +1/+1 counter on it.
Repeat from step 2.

Phyrexian Altar

Put a +1/+1 counter on any creature you control.
Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
The Servo enters the battlefield, triggering Woodland Champion.
Holding priority, activate Krark-Clan Ironworks by sacrificing the Servo, adding {C}{C}.
Resolve the Woodland Champion trigger, putting a +1/+1 counter on it.
Repeat from step 2.

Combos with "Woodland Champion"