Quote from HeretixThe Hydra deck isn't meant to be a challenge to be specifically designed for to be broken. Quieten down your inner Spike to break formats. Just like how it is for Standard players facing the Hydra, you are meant to just field your regular Standard deck that you would regularly play. If your Modern deck has Mirrorweave maindeck... I would love to see your results with that deck and a deck list.
Just like in the scenario I painted above, this is something to be done between rounds at Modern FNMs or when you're waiting for FNM to start. Not a chance to show off how quickly you can kill the Hydra with a custom designed deck. You are potentially piloting the Hydra deck against yourself, so not only do you not get brownie points, you don't have fun either.
Quote from mrofniPeople like bombos better then combos.