diff --git a/src/App.css b/src/App.css
index b9d355d..592d97d 100644
--- a/src/App.css
+++ b/src/App.css
@@ -2,41 +2,4 @@
   max-width: 1280px;
   margin: 0 auto;
   padding: 2rem;
-  text-align: center;
-}
-
-.logo {
-  height: 6em;
-  padding: 1.5em;
-  will-change: filter;
-  transition: filter 300ms;
-}
-.logo:hover {
-  filter: drop-shadow(0 0 2em #646cffaa);
-}
-.logo.react:hover {
-  filter: drop-shadow(0 0 2em #61dafbaa);
-}
-
-@keyframes logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
-}
-
-@media (prefers-reduced-motion: no-preference) {
-  a:nth-of-type(2) .logo {
-    animation: logo-spin infinite 20s linear;
-  }
-}
-
-.card {
-  padding: 2em;
-}
-
-.read-the-docs {
-  color: #888;
 }
diff --git a/src/App.tsx b/src/App.tsx
index a7389dd..b72279c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -3,6 +3,7 @@ import "./App.css";
 import { Equipment } from "./components/Equipment";
 import { reducer, withLoadingAction } from "./lib/state";
 import type { ItemId } from "./lib/types";
+import { SourceList } from "./components/SourceList";
 
 function App() {
   const [state, dispatch] = useReducer(withLoadingAction(reducer), "loading");
@@ -44,6 +45,7 @@ function App() {
         onEquip={(item) => dispatch({ action: "equipItem", item })}
         onUnequip={(item) => dispatch({ action: "unequipItem", item })}
       />
+      <SourceList state={state} />
     </>
   );
 }
diff --git a/src/components/Equipment.module.css b/src/components/Equipment.module.css
new file mode 100644
index 0000000..b89f4aa
--- /dev/null
+++ b/src/components/Equipment.module.css
@@ -0,0 +1,17 @@
+.equipedItems {
+  display: grid;
+  gap: 8px;
+  grid-template-columns: 200px 1fr;
+  align-items: stretch;
+}
+
+.gridItem {
+  padding: 4px 8px;
+  border: 1px solid #666;
+}
+
+.slot {
+}
+
+.items {
+}
diff --git a/src/components/Equipment.tsx b/src/components/Equipment.tsx
index baa2e7f..c9032ca 100644
--- a/src/components/Equipment.tsx
+++ b/src/components/Equipment.tsx
@@ -3,6 +3,7 @@ import type { State } from "../lib/state";
 import { Slots, type Item, type Slot } from "../lib/types";
 import { ItemLink } from "./ItemLink";
 import { ItemTypeahead } from "./ItemTypeahead";
+import styles from "./Equipment.module.css";
 
 export type Props = {
   state: State;
@@ -13,9 +14,11 @@ export type Props = {
 export const Equipment = ({ state, onEquip, onUnequip }: Props) => (
   <div>
     <ItemTypeahead value={null} onSelect={onEquip} />
-    {Slots.map((slot) => (
-      <Slot state={state} slot={slot} onUnequip={onUnequip} key={slot} />
-    ))}
+    <div className={styles.equipedItems}>
+      {Slots.map((slot) => (
+        <Slot state={state} slot={slot} onUnequip={onUnequip} key={slot} />
+      ))}
+    </div>
   </div>
 );
 
@@ -26,16 +29,18 @@ type SlotProps = {
 };
 
 const Slot = ({ state, slot, onUnequip }: SlotProps) => (
-  <div>
-    {slot}:{" "}
-    {state.equipedItems
-      .map((item) => ({ ...item, item: ItemsById[item.id] }))
-      .filter((item) => item && item.item.slot === slot)
-      .map((item) => (
-        <span>
-          <ItemLink item={item.item} />({item.quality})
-          <button onClick={() => onUnequip(item.item)}>X</button>
-        </span>
-      ))}
-  </div>
+  <>
+    <div className={`${styles.slot} ${styles.gridItem}`}>{slot}</div>
+    <div className={styles.gridItem}>
+      {state.equipedItems
+        .map((item) => ({ ...item, item: ItemsById[item.id] }))
+        .filter((item) => item && item.item.slot === slot)
+        .map((item) => (
+          <div>
+            <ItemLink item={item.item} />({item.quality})
+            <button onClick={() => onUnequip(item.item)}>X</button>
+          </div>
+        ))}
+    </div>
+  </>
 );
diff --git a/src/components/SourceList.module.css b/src/components/SourceList.module.css
new file mode 100644
index 0000000..5d0d646
--- /dev/null
+++ b/src/components/SourceList.module.css
@@ -0,0 +1,5 @@
+.sourceList {
+  display: grid;
+  gap: 8px;
+  grid-template-columns: 1fr 6em 6em 6em;
+}
diff --git a/src/components/SourceList.tsx b/src/components/SourceList.tsx
new file mode 100644
index 0000000..0886a18
--- /dev/null
+++ b/src/components/SourceList.tsx
@@ -0,0 +1,40 @@
+import * as _ from "lodash";
+import { getUpgrades, qualityAtMost } from "../lib/items";
+import type { State } from "../lib/state";
+import type { Item } from "../lib/types";
+import styles from "./SourceList.module.css";
+
+export type Props = {
+  state: State;
+};
+
+export const SourceList = ({ state }: Props) => {
+  const upgrades = getUpgrades(state.equipedItems);
+
+  const upgradesBySource = _.groupBy(
+    upgrades,
+    (upgrade: { item: Item }) => upgrade.item.source,
+  );
+
+  return (
+    <div className={styles.sourceList}>
+      <div>Source</div>
+      <div>Champion</div>
+      <div>Hero</div>
+      <div>Myth</div>
+      {Object.entries(upgradesBySource).map(([source, items]) => {
+        const champion = items.filter(qualityAtMost("champion")).length;
+        const hero = items.filter(qualityAtMost("hero")).length;
+        const myth = items.filter(qualityAtMost("myth")).length;
+        return (
+          <>
+            <div>{source}</div>
+            <div>{champion}</div>
+            <div>{hero}</div>
+            <div>{myth}</div>
+          </>
+        );
+      })}
+    </div>
+  );
+};
diff --git a/src/index.css b/src/index.css
index 08a3ac9..2043a1c 100644
--- a/src/index.css
+++ b/src/index.css
@@ -18,6 +18,7 @@ a {
   color: #646cff;
   text-decoration: inherit;
 }
+
 a:hover {
   color: #535bf2;
 }
diff --git a/src/lib/items.ts b/src/lib/items.ts
index 4dd7ccb..03f8bba 100644
--- a/src/lib/items.ts
+++ b/src/lib/items.ts
@@ -1,5 +1,11 @@
 import _ from "lodash";
-import { type Item, type ItemId, type Slot } from "./types";
+import {
+  type EquipedItem,
+  type Item,
+  type ItemId,
+  type Quality,
+  type Slot,
+} from "./types";
 
 export const PrioryOfTheSacredFlame = [
   { id: 219309 as ItemId, slot: "trinket", name: "Tome of Light's Devotion" },
@@ -26,7 +32,73 @@ export const ItemsById: Record<string, Item> = AllItems.reduce(
 
 export const ItemsBySlot: Record<Slot, Item[]> = _.groupBy(
   AllItems,
-  (item) => item.slot,
+  (item: Item) => item.slot,
 );
 
 export const itemsForSlot = (slot: Slot): Item[] => ItemsBySlot[slot] ?? [];
+
+function qualityToNumber(quality: Quality): number {
+  switch (quality) {
+    case "champion":
+      return 1;
+    case "hero":
+      return 2;
+    case "myth":
+      return 3;
+    default:
+      return 0;
+  }
+}
+
+function numberToQuality(quality: number): Quality | null {
+  switch (quality) {
+    case 1:
+      return "champion";
+    case 2:
+      return "hero";
+    case 3:
+      return "myth";
+    default:
+      return null;
+  }
+}
+
+export const qualityAtLeast =
+  (desiredQuality: Quality) =>
+  ({ quality: actualQuality }: { quality: Quality }): boolean =>
+    qualityToNumber(actualQuality) >= qualityToNumber(desiredQuality);
+
+export const qualityAtMost =
+  (desiredQuality: Quality) =>
+  ({ quality: actualQuality }: { quality: Quality }): boolean =>
+    qualityToNumber(actualQuality) <= qualityToNumber(desiredQuality);
+
+export const getUpgrades = (
+  equipedItemIds: EquipedItem[],
+): { item: Item; quality: Quality }[] => {
+  return Object.entries(ItemsBySlot).flatMap(([slot, items]) => {
+    const equipedItems = equipedItemIds.flatMap(({ id, quality }) => ({
+      item: ItemsById[id],
+      quality,
+    }));
+    const equipedInSlot = equipedItems.filter(
+      (item) => item.item.slot === slot,
+    );
+    return items.flatMap((item) => {
+      if (equipedInSlot.length === 0) {
+        return [{ item, quality: "champion" as Quality }];
+      }
+      // Change this to some sort of quality-plus-one logic
+      if (equipedInSlot.every(qualityAtLeast("myth"))) {
+        return [];
+      }
+      if (equipedInSlot.every(qualityAtLeast("hero"))) {
+        return [{ item, quality: "myth" as Quality }];
+      }
+      if (equipedInSlot.every(qualityAtLeast("champion"))) {
+        return [{ item, quality: "hero" as Quality }];
+      }
+      return [];
+    });
+  });
+};