Activate Experiment Kraj by tapping it, putting a +1/+1 counter on itself.
Activate Experiment Kraj using Pili-Pala's ability by paying 2 and untapping it, adding 1.
Repeat from step 2 until Experiment Kraj has five +1/+1 counters.
Activate Experiment Kraj using Sage of Hours' ability by removing all +1/+1 counters from it, causing you to take at least one extra turn after this one.