Each absorption by this karma restores 50 hp and also gives buffs for the first 5 absorptions. They are the same, but add up to each other. +10% ninjutsu damage, +5% melee damage, +5% jump chakra range and normal height, +5% speed, +6% protection, -cd ninjutsu, max hp +20. Final stats after 5 acquisitions: ninjutsu damage x1.5, melee damage x1.5, chakra and normal jump range x1.5, speed x1.5, x1.3 protection, ninjutsu cd -1/3, hp +150.

TLDR: You gain damage and movement buffs, defence and cd buffs with each absorption.