The Demonic Hydra is a Legendary pet in Bubble Gum Simulator. It can be obtained by opening a Nightmare Egg. The chance of hatching it is 0.005% (1 in 20,000), or 0.01% (1 in 10,000) with the Lucky Chances gamepass.
It can also be obtained in the following ways:
- Opening 50,000 eggs and/or boxes and claiming the prize.
- Purchasing the 115th slot at the Rewards Island.
- Purchasing the 153rd slot at the Sea Rewards.
- Purchasing the 158th slot at the Atlantis Rewards.
- Purchasing the 156th slot at the Magma Rewards.
- Purchasing the 156th slot at the Crystal Rewards.