Summon Hydra

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Version 0.28: This article may not be up to date for the latest stable release of Crawl.
Summon hydra.png Summon Hydra
Level 7
School1 Summoning
Source(s) Book of Blood
Fen Folio
Casting noise 6
Spell noise 0
Power Cap 200
Flags Mons abjure
Summons a many-headed hydra to fight alongside the caster for a short time. Spell power determines the number of heads.

Summon Hydra is a level 7 Summoning spell which summons a friendly hydra.


A hydra with 4 to 12 heads is summoned. The number of heads depends on spell power, but it's quite rare to get more than 8. There is a summon limit of 2; additonal summons will cause the oldest to very quickly time out. The duration of the summon does not depend on the spell power and is always very short, around 9 turns.

The number of heads is (1d<power> - 1) / 6, but at least 4 and at most 12. There is always an 83% chance that the number of heads is limited to 8.[1]

Monster Version

The following enemies cast Summon Hydra:

Note that Bai Suzhen cannot cast this spell while in the storm dragon form.


  • Summon Hydra was added in 0.8.