Times when a character attempts to control a wild entity had backfired on them

Something I just felt like discussing was that one trope (don’t know what the trope is called) in media where a character summons a very powerful being to help them wipe out their enemies for their own benefits, but then ends up being betrayed by said creature as its power is so enormous that it ends up attacking anyone who stands in its way.

To illustrate an example, Dr. Robotnik in the modern Sonic the Hedgehog games has a tendency to rely on creatures to attack Sonic as during the first Sonic Adventure game, he summons a being made out of water, but the creature soon breaks out of his control, which becomes a huge problem for both the mad doctor and Sonic.