Design Thoughts: Toxic Substances Conversion from d20 System Games

I've been converting 103 toxic substances from Dungeons & Dragons 3.5 and 5th edition, and Pathfinder 1st edition, meaning that this is the time I get to definitely establish the price and damage conversions I'll use from Dungeons & Dragons and Pathfinder to Ironcrunch, at least in terms of items (not foes). The principle is to achieve balance and verisimilitude with the meaning of the numeric values with thins system.

After much fiddling with the stats, this is the most balanced formula I came up with to finish and polish the upcoming hazards, traps, and toxic substances sections of the rulebook.

PRICES

Each 200 gold piece from Dungeons & Dragons and Pathfinder equals 1 wealth in Ironcrunch, rounding down or up depending on my own judgment of balance according to the item in question. Anything that goes from 2000 gold pieces and beyond equals 10 wealth.

TOXIC SUBSTANCES

Dungeons & Dragons, 3.5th edition

• Physical damage: Lower the dice size by 1, then half it, rounding down.
• Max roll result 1-6 in CON damage: 1d4 harm (1-4).
• Max roll result 7-12 in CON damage: 2d4 harm (2-8).
• Max roll result 13-18 in CON damage: 2d6 harm (2-12).
• Max roll result 19-24 in CON damage: 2d8 harm (2-16).
• Max roll result 25-30 in CON damage: 2d10 harm (2-20).
• Max roll result 31-36 in CON damage: 2d10+1d4 harm (3-24).
• Max roll result 8 in DEX damage: Palsied or unsteady condition.

Pathfinder, 1st edition

• Physical damage: Lower the dice size by 1, then half it, rounding down.
• Max roll result 1-2 in CON damage: 1d4 harm (1-4).
• Max roll result 3-4 in CON damage: 2d4 harm (2-8).
• Max roll result 5-6 in CON damage: 2d6 harm (2-12).
• Max roll result 7-8 in CON damage: 2d8 harm (2-16).
• Max roll result 9-10 in CON damage: 2d10 harm (2-20).
• Max roll result 11-12 in CON damage: 2d10+1d4 harm (3-24).
• Max roll result 13-14 in CON damage: 2d12+1d4 harm (3-28).
• Max roll result 15-16 in CON damage: 2d12+1d8 harm (3-32).
• Max roll result 17-18 in CON damage: 3d12 harm (3-36)
• Max roll result 1-2 in WIS damage: 1 stress.
• Max roll result 1-3 in STR damage: Weakened (severity +1) condition.
• Max roll result 1-3 in bleed damage: Poisoned (severity +1) condition.
• DEX damage: Palsied or unsteady condition. 
• Sickened: Poisoned (severity +1) condition.

Dungeons & Dragons, 5th edition

• Physical damage: -4, then half it, rounding up.
• Psychic damage: 1-6=2 stress.
• 1 CON damage: 1d4 harm.
• If the damage taken is poison: Poisoned (severity +1) condition.
• 1 STR damage: Weakened (severity +1) condition.
• 2 or more STR damage: Weakened (severity 2) condition.
• WIS/INT damage: Stupefied condition.

Severity of poisoned condition

If the poison effect...

• Prompts to make a save throw every 24 hours: Poisoned (severity +1) condition.
• Prompts to make a save throw every turn: Poisoned (severity +3) condition.
• Lasts 1-12 hours: Poisoned (severity +1) condition.
• Lasts 13-23 hours: Poisoned (severity +2) condition.
• Lasts 24 hours or more: Poisoned (severity +3) condition.
• Can't be healed by any means: Poisoned (severity +3) condition.

SOME NOTES AND WHAT'S NEXT

Some poisons have been shown to grant some benefits. For these cases, I chose not to let them listed among the toxic substances, but with the consumable items, leaving the negative effects of each as a drawback for the benefits they give.

I'm currently working on balancing all these substances. Soon, I'll release a Google Drive Excel file with them all so you have a better perspective.