In the hero gacha there are hero badges.
Get 2 badges of a hero and that hero can now level up to 1500.
In the hero gacha there are hero badges.
Get 2 badges of a hero and that hero can now level up to 1500.
The badges are permanent once you get them. The main problem is getting 2 of them for the same hero as weapons are more common from the hero gacha.
My Beast King does more damage than the next 8 heroes. With him I now get past the stage 800 roadblock with only Phantom Barrage active.