Rocky

Rocky is the tank that actually earns its keep. At 1 in 13,900 it is the rarest of the early legendaries, and Tier B as the best early tank is no accident: it lets you sit in zones that would otherwise reset you, while still dealing enough damage to keep fights moving instead of stalling.

Pair Rocky with a farmer like Orca and you stop dying long enough to bank a first rebirth. After the rebirth multiplier kicks in, Rocky stays useful for a surprising stretch, because the role it solves — sustained survival in mid zones — does not get redundant until Aegis or Icy lands in the divine tier. Until that point, Rocky is the wall holding your run together.

It is the last pre-mythic slime most players keep on purpose, and that is high praise in a roster this deep. By the time you have Lucky stacking your luck and Stump in front of an attacker, Rocky has settled into a long quiet career as your durability anchor. Replace it only when the next genuine tank arrives, not when something rarer but weaker tempts you off the slot.