All that’s needed to make antibiotics is alcohol. The best way to get some is to win the Grand Bout, which the Senku and his kingdom will also need to do in order to keep Magma away from Ruri and give her the drug.
If you lose to Magma, 
I'm going to have to beat him!
!إن خسرت أمام ماغما، فسيتوجّب عليّ أنا أن أهزمه
Si Kinro perd contre Magma,
c’est moi qui vais devoir me le farcir !
Se Kinro perdesse contro Magma,
toccherebbe a me batterlo!
Se você perder para o Magma,
eu vou ter que vencê-lo!
Если ты проиграешь Магме,
то побеждать его придётся мне!