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Defeating Dream Devourer with Integer Overflow in Chrono Trigger

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Dream Devourer is a special optional boss in Chrono Trigger (DS and later versions), appearing in Darkness At The End Of Time. It represents an intermediary evolutionary stage between Schala and Lavos before becoming the Time Devourer. The boss battle occurs in two phases: the first phase counters physical attacks with Mana Reaper, depleting MP, requiring strong magical attacks like Luminaire, Flare, and Electrocute; the second phase absorbs all elements and counters with Chaos Zone, inflicting confusion, necessitating non-magical techs like Cleave, Frenzy, and Triple Kick, along with status-immunity equipment and high HP to survive its devastating Phantasm and The End of All and Nothing attacks.

Notably, due to its 32000 HP—close to the signed 16-bit integer limit—players can defeat it by healing it past 32767 HP using absorbed magic during the second phase, causing an integer overflow that wraps HP to negative values, effectively killing it. This trick leverages the game's internal HP counter limitation, turning a defensive mechanic into an offensive exploit.