Not a fan of ability score damage in 5e, for long lasting effects I like exhaustion.
So my yellow mold would be something like.
DC 15 to spot, each patch of 5' sq mold needs to be cleared away with 10 points of fire damage.
Make a Con save DC 15.
Failure = 6d8 damage and 2 levels of exhaustion
Success = half damage and 1 level of exhaustion
So my yellow mold would be something like.
DC 15 to spot, each patch of 5' sq mold needs to be cleared away with 10 points of fire damage.
Make a Con save DC 15.
Failure = 6d8 damage and 2 levels of exhaustion
Success = half damage and 1 level of exhaustion