Add custom Die class for handling the ripping and crypting dice

module/dice/CryptDie.mjs

@@ -0,0 +1,56 @@
+import { Logger } from "../utils/Logger.mjs";
+
+const { Die } = foundry.dice.terms;
+
+export class CryptDie extends Die {
+	static get MODIFIERS() {
+		return {
+			...super.MODIFIERS,
+			"rc": `ripOrCrypt`,
+		};
+	};
+
+	ripCryptState = undefined;
+	async ripOrCrypt(modifier) {
+
+		const rgx = /rc([0-9]+)/i;
+		const match = modifier.match(rgx);
+		if (!match) { return false };
+		let [ target ] = match.slice(1);
+
+		/*
+		Handle "Ripping" rolls, which is equivalent to re-rolling 8's and counting
+		it as a success.
+		*/
+		await this.explode(`x=8`, { recursive: true });
+		if(this.results.some(result => result.exploded)) {
+			this.ripCryptState = `ripping`;
+		};
+
+		/*
+		Handles "Crypting" rolls, which is a single explosion that allows
+		*/
+		if (!this.ripCryptState) {
+			await this.explode(`xo=1`, { recursive: false });
+
+			let almostCrypted = false;
+			for (const result of this.results) {
+				if (result.result !== 1) { continue };
+				if (almostCrypted) {
+					this.ripCryptState = `crypted`;
+					break;
+				} else {
+					almostCrypted = true;
+				}
+			}
+		};
+
+		// Count successes and deduct failures from total
+		await this.countSuccess(`cs>=${target}`);
+		await this.deductFailures(`df<${target}`);
+	};
+
+	get total() {
+		return Math.max(super.total, 0);
+	}
+};