diff --git a/langs/en-ca.json b/langs/en-ca.json
index 65bb80d..adda6f2 100644
--- a/langs/en-ca.json
+++ b/langs/en-ca.json
@@ -11,6 +11,9 @@
 			"shield": "Shield",
 			"skill": "Skill",
 			"weapon": "Weapon"
+		},
+		"RegionBehavior": {
+			"difficultyDelta": "Condition Delta"
 		}
 	},
 	"RipCrypt": {
@@ -189,6 +192,16 @@
 			"current-tour": "Current Delve Tour",
 			"next-tour": "Next Delve Tour",
 			"prev-tour": "Previous Delve Tour"
+		},
+		"region": {
+			"difficultyDelta": {
+				"FIELDS": {
+					"delta": {
+						"label": "Delta",
+						"hint": "How much should actors in this area have their difficulty changed from the global value."
+					}
+				}
+			}
 		}
 	}
 }
diff --git a/module/data/Behavior/DifficultyDelta.mjs b/module/data/Behavior/DifficultyDelta.mjs
new file mode 100644
index 0000000..3a6691f
--- /dev/null
+++ b/module/data/Behavior/DifficultyDelta.mjs
@@ -0,0 +1,71 @@
+import { Logger } from "../../utils/Logger.mjs";
+
+const { fields } = foundry.data;
+const { RegionBehaviorType } = foundry.data.regionBehaviors;
+
+export class DifficultyDeltaBehaviorData extends RegionBehaviorType {
+	static LOCALIZATION_PREFIXES = [`RipCrypt.region.difficultyDelta`];
+
+	static defineSchema() {
+		return {
+			delta: new fields.NumberField({
+				required: true,
+				initial: 1,
+			}),
+		};
+	};
+
+	static events = {
+		[CONST.REGION_EVENTS.TOKEN_ENTER]: this.#onTokenEnter,
+		[CONST.REGION_EVENTS.TOKEN_EXIT]: this.#onTokenExit,
+	};
+
+	static async #onTokenEnter(event) {
+		Logger.debug(`token enter`, event, this);
+		const actor = event.data.token.actor;
+		// const token = event.data.token.object;
+		// Logger.debug(token.center, token.h)
+		if (!actor) { return };
+
+		let delta = actor.getFlag(game.system.id, `dcDelta`) ?? 0;
+		delta += this.delta;
+		actor.setFlag(game.system.id, `dcDelta`, delta);
+		ui.notifications.info(`Updated delta to: ${delta}`);
+		Logger.debug(`Updated delta to:`, delta);
+		// await canvas.interface.createScrollingText(
+		// 	token.center,
+		// 	delta,
+		// 	{
+		// 		distance: 2 * token.h,
+		// 		fontSize: 40,
+		// 		fill: `#aa0000`,
+		// 	}
+		// );
+	};
+
+	static async #onTokenExit(event) {
+		Logger.debug(`token exit`, event, this);
+		const actor = event.data.token.actor;
+		// const token = event.data.token.object;
+		if (!actor) { return };
+
+		let delta = actor.getFlag(game.system.id, `dcDelta`) ?? 0;
+		delta -= this.delta;
+		if (delta === 0) {
+			actor.unsetFlag(game.system.id, `dcDelta`);
+		} else {
+			actor.setFlag(game.system.id, `dcDelta`, delta);
+		};
+		ui.notifications.info(`Updated delta to: ${delta}`);
+		Logger.debug(`Updated delta to:`, delta);
+		// await canvas.interface.createScrollingText(
+		// 	token.center,
+		// 	delta,
+		// 	{
+		// 		distance: 2 * token.h,
+		// 		fontSize: 40,
+		// 		fill: `#00aa00`,
+		// 	}
+		// );
+	};
+};
diff --git a/module/hooks/init.mjs b/module/hooks/init.mjs
index 547ea3e..41b6476 100644
--- a/module/hooks/init.mjs
+++ b/module/hooks/init.mjs
@@ -10,6 +10,7 @@ import { RipCryptCombatTracker } from "../Apps/sidebar/CombatTracker.mjs";
 import { AmmoData } from "../data/Item/Ammo.mjs";
 import { ArmourData } from "../data/Item/Armour.mjs";
 import { CraftData } from "../data/Item/Craft.mjs";
+import { DifficultyDeltaBehaviorData } from "../data/Behavior/DifficultyDelta.mjs";
 import { GoodData } from "../data/Item/Good.mjs";
 import { HeroData } from "../data/Actor/Hero.mjs";
 import { ShieldData } from "../data/Item/Shield.mjs";
@@ -56,6 +57,7 @@ Hooks.once(`init`, () => {
 	CONFIG.Item.dataModels.shield = ShieldData;
 	CONFIG.Item.dataModels.skill = SkillData;
 	CONFIG.Item.dataModels.weapon = WeaponData;
+	CONFIG.RegionBehavior.dataModels.difficultyDelta = DifficultyDeltaBehaviorData;
 	// #endregion
 
 	// #region Class Changes
diff --git a/system.json b/system.json
index 9924bfe..0adbd73 100644
--- a/system.json
+++ b/system.json
@@ -51,6 +51,9 @@
 			"shield": {},
 			"skill": {},
 			"weapon": {}
+		},
+		"RegionBehavior": {
+			"difficultyDelta": {}
 		}
 	}
 }
\ No newline at end of file