As it rained continuously, I would laugh at the Peins sleeping position, his body was twisted like a rag doll, I would watch and wait until I noticed a raindrop that would hit the pein's forehead, noticing one I would focus on the drop, I would transfer my rain chakra near instantaeneously into the rain drop after which I would use the water chakra part of the rain chakra to condense the drop until it has solid like characteristics and I'd use the wind chakra part to sharpen the rain drop until it has the cutting power of a blade, the raindrop would drill a hole in the pein's head.
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Focusing rain chakra into a drop, I would watch as it hits a puddle, using the rain chakra, the drop would gather more water from the puddle forming a small spike of water from the puddle stabbing the unlucky pein.
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Focusing rain chakra into the clouds, I would use it to converge several raindrops after which I'll shape manipulate it into a spear, performing an handseal, the spear would drop from the sky stabbing the pein's head