User blog comment:Derpus42/Well Hi there/@comment-25924729-20150114065328

1. The original 30 seconds paralysis can still be done, but to balance it out, maybe make it backfire on your Medusa a bit. Perhaps using the semblance makes her weak for a some time afterwards, or she can only use the semblance once a day otherwise the strain will severely damage her.

2. There is also a type of gladiator fighting style called Retiarius. They parody fishing when they fight by wielding tridents and nets, catching opponents in the nets then impaling them. Sounds pretty fitting for a mermaid eh?