Rumbling Furnace is the battle pass. It unlocks after Get Stronger, Adventurer at AR 4.
Daily and Weekly Adventure Activity awards Rumbling Heat Orbs, which raise Pot Level. Daily rewards provide 2,000 Heat and weekly rewards provide 18,000 Heat.
Rewards include growth materials, Standard Contracts, Rutacoins, and Rumbling Gears for exchanges. Level 60 grants the SSR Buddy Kojiro on the free track.
Paid Pot options add rewards. Pot of Festivities includes 10 levels, while direct level purchases cost 60 Rutacoins per level.