here preta path absorbs jiraiyas ultimate rasengan.No. The size is absolutely irrelevant. It is the amount of chakra which is important. The more chakra, the longer it takes to absorb. If you have one 'calorie' worth of chakra, and it is spread over 100 square meters, it will be devoured instantly. If you have 100 'calories' worth of chakra in one square meter, it will take slightly longer. This is why Naruto's claim that Nagato's techniques are "one a way higher level" seems all the more impressive. He was able to absorb that much chakra that quickly. While the Perfect Susanoo may be great in size, it is not great in chakra when compared to a complete Bijuu. It may be around the same amount Bee had in his V2 cloak. I already explained how it is made up of even less than Madara's chakra reserve. Nagato already swiped this chakra instantaneously. He will eat up the Susanoo in a time period of seconds.
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here he absorbs bees cloak
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which has more chakra? bees bijuu cloak. which took longer to absorb? jiraiyas rasengan
the size of the technique matters.