The Mechanics (FoundryVTT Setup)
To keep the “ticking clock” feel without making it impossible for her to play, I suggest the following mechanical onset:
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The Initial Save: Have Davira roll a DC 15 Constitution Saving Throw.
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On a Failure: She gains the Poisoned condition (Disadvantage on Attack rolls and Ability checks) and takes 7 (2d6) necrotic damage.
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On a Success: She is not poisoned, but she takes the 7 (2d6) necrotic damage as her body fights off the infection.
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The Ticking Clock (During Combat):
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At the start of each of her turns, Davira takes 3 (1d6) necrotic damage.
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Concentration: This damage triggers a Concentration check (DC 10). This represents the struggle of keeping her magic stable while her blood is literally being corrupted.
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