Is a resource representing food, water and other generic survival supplies in one. It will mostly act as a currency you spend to travel. This resource will go into your shared party token’s inventory. It will automatically be added to the party inventory if you loot any, likewise it will automatically be removed when consumed. You won’t have to manage it in your own inventory.

Each day you spend without supply, you will gain a level of exhaustion.

Action:Cost
Travelling at standard speed (24 miles)10 Supplies per day
Travelling at haste (30 miles)15 supplies per day
short rest10 Supplies
long rest50 supplies

Maximum supply

The party may carry a maximum of 50 Supplies. For every +1 modifier to strength in the party may carry an extra 5 supplies in their shared inventory.

+50  baseline
+15  grimnacht +3 str mod
+15  Titus +3 str mod
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Current maximum: 90 supply.  

Purchasing supply:

Supply can be purchased from any friendly village, town or city at a rate of 1 silver per supply.

Foraging:

A maximum of 2 players may forage for food and water per day. In order to attempt to forage a player must be proficient in the survival skill. Roll a Survival (wisdom) skill check, DC set by the environment (tile) type. on a success you gain 1d4 rations. On a critical success you gain 2d4 rations, up to your maximum carry capacity.

TerrainDC
Grassland (verdant), Jungle, Forest (flat)15
Grassland (sparse), Hills17
Desert, Artic20
Badlands, wastelands25

misc:

Summoned foodstuffs do not count towards supply (e.g. goodberries, create water).