Pili-Pala and Ley Weaver each have at least one +1/+1 counter on it.
You control up to two lands that can tap to produce at least ({1} magic symbol) .
({1} magic symbol) if you only control one mana-producing land available.
Steps
Activate Experiment Kraj using Ley Weaver's ability by tapping it, untapping two lands you control.
Activate a land by tapping it, adding at least ({1} magic symbol) .
Activate Experiment Kraj using Torchling's first ability by paying ({2} magic symbol) and untapping Experiment Kraj, adding one mana of any color.
Repeat.
You may tap an additional land each cycle to get infinite mana, and you may then use Experiment Kraj's ability to put infinite +1/+1 counters on creatures you control.