Mach Max Limit Break

Finally got Mach to max limit break in the Roulette Event Special Edition. Since I still haven't gotten any of this month's featured summon limited units, I was grinding with only Mach as the bonus unit for a 10% attack bonus, but it actually went surprisingly well (there's still plenty of time until the event ends). I'm really grateful for events that allow us to level up units that we only managed to get to ☆8 or ☆9 in past roulette events. I truly hope they continue to hold these in the future. If I had to be greedy, I'd want it for all units.