Till now, he has killed countless crocodiles.
He has a rough idea of what gene modifications crocodiles will drop at what size.
From smallest to six foot long crocodiles will drop minor healing gene modification.
It will improve your rate of healing, but not to an extent it's absurd. It will probably let you heal in seven days as opposed to nine, be twenty five percent more immune to diseases spread from amphibians, and if your luck is really bad, it will come with a built-in debuff. This debuff will be similar to having an allergy. You can not eat eggplant, or wild lentils, which is usually the case with people who got affected by crocodile venom and recovered.
Obviously, normal people could not recognize this stuff. Only Vikram can, as the master of the one and only evolver orb.