The concept of antibodies isn’t bad: Making a stronger frontlane/making your DPS a little bit tankier, but it isnt making as much impact on fights as how it should, the % buffed should scale with chakra instead of beeing a flat ammount (Just like how @Adarya said) and it should be a CHK jutsu, not INT required, if it lasts for longet (1m+), it’d enable way more plays around the buffed ninjas