diff --git a/spec/support/ds4rolls.spec.ts b/spec/support/ds4rolls.spec.ts
index 093f3157..6b8e3228 100644
--- a/spec/support/ds4rolls.spec.ts
+++ b/spec/support/ds4rolls.spec.ts
@@ -1,4 +1,10 @@
-import { rollCheckSingleDie, RollOptions, RollResult, RollResultStatus } from "../../src/module/rolls/roll-executor";
+import {
+    rollCheckMultipleDice,
+    rollCheckSingleDie,
+    RollOptions,
+    RollResult,
+    RollResultStatus,
+} from "../../src/module/rolls/roll-executor";
 import { RollProvider } from "../../src/module/rolls/roll-provider";
 
 describe("DS4 Rolls with one die and no modifications.", () => {
@@ -68,6 +74,7 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(1);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(4, RollResultStatus.CRITICAL_SUCCESS, [1]),
         );
@@ -77,6 +84,7 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(2);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(4, RollResultStatus.CRITICAL_SUCCESS, [2]),
         );
@@ -86,6 +94,7 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(3);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(3, RollResultStatus.SUCCESS, [3]),
         );
@@ -95,6 +104,7 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(18);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(0, RollResultStatus.FAILURE, [18]),
         );
@@ -104,6 +114,7 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(19);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(0, RollResultStatus.CRITICAL_FAILURE, [19]),
         );
@@ -113,8 +124,61 @@ describe("DS4 Rolls with one die and crit roll modifications.", () => {
         const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRoll"]);
 
         rollProvider.getNextRoll = jasmine.createSpy("getNextRoll").and.returnValue(20);
+
         expect(rollCheckSingleDie(4, { maxCritSucc: 2, minCritFail: 19 }, rollProvider)).toEqual(
             new RollResult(0, RollResultStatus.CRITICAL_FAILURE, [20]),
         );
     });
 });
+
+describe("DS4 Rools with multiple dice and no modifiers.", () => {
+    it("Should do a crit fail on `20` for first roll.", () => {
+        const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRolls"]);
+
+        rollProvider.getNextRolls = jasmine.createSpy("getNextRolls").and.returnValue([20, 15, 6]);
+
+        expect(rollCheckMultipleDice(48, new RollOptions(), rollProvider)).toEqual(
+            new RollResult(0, RollResultStatus.CRITICAL_FAILURE, [20, 15, 6]),
+        );
+    });
+
+    it("Should succeed with all rolls crit successes.", () => {
+        const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRolls"]);
+
+        rollProvider.getNextRolls = jasmine.createSpy("getNextRolls").and.returnValue([1, 1, 1]);
+
+        expect(rollCheckMultipleDice(48, new RollOptions(), rollProvider)).toEqual(
+            new RollResult(48, RollResultStatus.SUCCESS, [1, 1, 1]),
+        );
+    });
+
+    it("Should succeed with the last roll not being suficient.", () => {
+        const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRolls"]);
+
+        rollProvider.getNextRolls = jasmine.createSpy("getNextRolls").and.returnValue([15, 15, 15]);
+
+        expect(rollCheckMultipleDice(48, new RollOptions(), rollProvider)).toEqual(
+            new RollResult(30, RollResultStatus.SUCCESS, [15, 15, 15]),
+        );
+    });
+
+    it("Should succeed with the last roll a crit success.", () => {
+        const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRolls"]);
+
+        rollProvider.getNextRolls = jasmine.createSpy("getNextRolls").and.returnValue([15, 15, 1]);
+
+        expect(rollCheckMultipleDice(48, new RollOptions(), rollProvider)).toEqual(
+            new RollResult(35, RollResultStatus.SUCCESS, [1, 15, 15]),
+        );
+    });
+
+    it("Should succeed with the last roll being 20 and one crit success.", () => {
+        const rollProvider: RollProvider = jasmine.createSpyObj("rollProvider", ["getNextRolls"]);
+
+        rollProvider.getNextRolls = jasmine.createSpy("getNextRolls").and.returnValue([15, 1, 20]);
+
+        expect(rollCheckMultipleDice(48, new RollOptions(), rollProvider)).toEqual(
+            new RollResult(40, RollResultStatus.SUCCESS, [1, 20, 15]),
+        );
+    });
+});
diff --git a/src/module/rolls/roll-executor.ts b/src/module/rolls/roll-executor.ts
index a4b67e32..1c23d3f2 100644
--- a/src/module/rolls/roll-executor.ts
+++ b/src/module/rolls/roll-executor.ts
@@ -30,27 +30,41 @@ export function rollCheckSingleDie(
     }
 }
 
-function rollCheckMultipleDice(testValue: number, rollOptions: RollOptions): RollResult {
+export function rollCheckMultipleDice(
+    testValue: number,
+    rollOptions: RollOptions,
+    provider: RollProvider = new DS4RollProvider(),
+): RollResult {
     const finalCheck = testValue % 20;
     const numberOfDice = Math.ceil(testValue / 20);
-    const rolls = new Array<Roll>();
-    for (let i = 0; i < numberOfDice; i++) {
-        const roll = new Roll("1d20");
-        roll.roll();
-        rolls.concat(roll);
-    }
-    const dice = rolls.map((r) => r.total);
 
-    const firstResult = dice[1];
+    const dice = provider.getNextRolls(numberOfDice);
+
+    console.log(dice[0]);
+    console.log(rollOptions.minCritFail);
+
+    const firstResult = dice[0];
 
     if (firstResult >= rollOptions.minCritFail) {
         return new RollResult(0, RollResultStatus.CRITICAL_FAILURE, dice);
     }
 
-    const [otherRolls, critSuccesses] = dice
-        .partition((r) => r <= rollOptions.maxCritSucc)
+    const partitionCallback = (prev: [Array<number>, Array<number>], cur: number) => {
+        if (cur <= rollOptions.maxCritSucc) {
+            prev[0].push(cur);
+        } else {
+            prev[1].push(cur);
+        }
+        return prev;
+    };
+
+    const [critSuccesses, otherRolls] = dice
+        .reduce(partitionCallback, [[], []])
         .map((a) => a.sort((r1, r2) => r2 - r1));
 
+    console.log(critSuccesses);
+    console.log(otherRolls);
+
     const sortedRollResults: Array<number> = critSuccesses.concat(otherRolls);
 
     const evaluationResult = sortedRollResults
@@ -59,7 +73,7 @@ function rollCheckMultipleDice(testValue: number, rollOptions: RollOptions): Rol
                 if (value == 1) {
                     return finalCheck;
                 } else {
-                    return value >= finalCheck ? value : 0;
+                    return value <= finalCheck ? value : 0;
                 }
             } else {
                 if (value <= rollOptions.maxCritSucc) {