Echidna's Coil (Summoning Key)

The Echidna's Coil is a summoning key tied to Echidna, the mother of monsters — a coil whispered about by those who hunt her.

The rest — what she does with it, and what she leaves behind — is left for those who earn it to discover.

Coils stack like any other item, and a stack you split in your inventory or your vault now stays split.

There is a second, separate relic for her Uber version: Echidna's Brood Knot, which goes into the same altar and calls Uber Echidna. It isn't a Coil upgrade and isn't forged from essence — see Uber Bosses.

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