Reaching level 55 unlocks Iso-8 energy for further character progression. To make this guide better for you, tell me: Are you a brand new player or returning?
Visit the MSF website daily to claim free gifts and check the milestone rewards.
Progress through Heroes/Villains/Nexus to unlock required characters and gear.
Use your strongest team (like Spider Society) to climb ranks for daily Power Cores.
These are scarce. Be careful not to level up every character you unlock; focus on your main teams.
Focus on unlocking and building the Spider Society team early; they are highly effective in early Arena and Raid modes.