1- Remember the first time Law met Doflamingo, he said he has no longer to live:
2- Before that Law himself already stated that Corazon saved his life:
I think Law was poisoned like the giant children from PH and like these giant children, it was said it's impossible to cure the poison, but Law did manage to cure them by using the ability of his DF(ope ope no mi) cuting them apart little by little to remove the deadly poison
And i think Corazon(possessing the ope ope no mi) did the same to save Law's life. But like we know after an ability user dies, the fruit grows again somewhere else in the world:
So likely Law(like Luffy in Ace's case) didn't want someone else to have the ability of someone he deeply cared of and looked for it. It's also possible though that with Doflamingo's multiple connections in the world, he found the fruit rapidely and gave it to Law so that such an ability doesn't go to waste
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2- Before that Law himself already stated that Corazon saved his life:
You must be registered for see links
I think Law was poisoned like the giant children from PH and like these giant children, it was said it's impossible to cure the poison, but Law did manage to cure them by using the ability of his DF(ope ope no mi) cuting them apart little by little to remove the deadly poison
And i think Corazon(possessing the ope ope no mi) did the same to save Law's life. But like we know after an ability user dies, the fruit grows again somewhere else in the world:
You must be registered for see links
So likely Law(like Luffy in Ace's case) didn't want someone else to have the ability of someone he deeply cared of and looked for it. It's also possible though that with Doflamingo's multiple connections in the world, he found the fruit rapidely and gave it to Law so that such an ability doesn't go to waste