Pumpkin

Pumpkin is the deep-secret tank, the rarest dedicated wall in the secret tier at 1 in 2.77 billion. Tier S confirms it still hits hard enough to swing fights on its own, so this is a tank that does not just soak damage, which sets it apart from cheaper tanks like Aegis or Huge Aegis where stats lag the headline rarity number.

Pair Pumpkin with a pure boss-killer like Blackhole or a generalist attacker like Ember so your team can survive the fights that would otherwise wipe a glass-cannon loadout outright. The honest comparison is Huge Aegis, which is also a high-tier tank but at a more reachable rarity — most accounts will run Huge Aegis through the divine and prismatic windows, and Pumpkin only takes the slot once secret-tier pulls feel realistic.

Until your stack is genuinely secret-deep, chasing Pumpkin is theoretical, and any earlier tank will keep your team alive in the meantime. By the time Pumpkin lands, your account has the depth to hold the front line through any documented content. After Pumpkin, the durability problem in your loadout is solved, and the remaining grind is purely about damage scaling at celestial rarities.