diff --git a/src/state.js b/src/state.js
index e194fe9..cac35f3 100644
--- a/src/state.js
+++ b/src/state.js
@@ -113,28 +113,9 @@ export function drawCards(state, playerIndexOrCount, count) {
   };
 }
 
-export function playCard(
-  state,
-  playerIndexOrHandIndex,
-  handIndexOrTarget,
-  targetIndex,
-) {
-  // playCard(state, handIndex) — old form, targets enemy[0]
-  // playCard(state, playerIndex, handIndex, targetIndex) — new form
-  let playerIndex, handIndex, enemyIndex;
-  if (handIndexOrTarget === undefined) {
-    playerIndex = 0;
-    handIndex = playerIndexOrHandIndex;
-    enemyIndex = 0;
-  } else if (targetIndex === undefined) {
-    playerIndex = 0;
-    handIndex = playerIndexOrHandIndex;
-    enemyIndex = handIndexOrTarget;
-  } else {
-    playerIndex = playerIndexOrHandIndex;
-    handIndex = handIndexOrTarget;
-    enemyIndex = targetIndex;
-  }
+export function playCard(state, handIndex, opts = {}) {
+  const playerIndex = opts.playerIndex ?? 0;
+  const enemyIndex = opts.targetIndex ?? 0;
 
   const player = state.players[playerIndex];
   const cardId = player.hand[handIndex];
diff --git a/src/state.test.js b/src/state.test.js
index fcbb4b8..41ad2e2 100644
--- a/src/state.test.js
+++ b/src/state.test.js
@@ -175,7 +175,7 @@ describe("playCard - indexed player and enemy", () => {
     let state = createCombatState(["ironclad", "ironclad"], ["jaw_worm"]);
     state = drawCards(state, 1, 5);
     const cardIndex = state.players[1].hand.indexOf("strike_r");
-    const next = playCard(state, 1, cardIndex, 0);
+    const next = playCard(state, cardIndex, { playerIndex: 1, targetIndex: 0 });
     expect(next.players[1].energy).toBe(2);
     expect(next.players[1].hand).toHaveLength(4);
     // player 0 unaffected
@@ -191,9 +191,22 @@ describe("playCard - indexed player and enemy", () => {
       players: [state.players[0], zeroEnergy],
     };
     const cardIndex = state.players[1].hand.indexOf("strike_r");
-    const result = playCard(state, 1, cardIndex, 0);
+    const result = playCard(state, cardIndex, {
+      playerIndex: 1,
+      targetIndex: 0,
+    });
     expect(result).toBeNull();
   });
+
+  test("playCard with targetIndex: 1 targets the second enemy", () => {
+    let state = createCombatState(["ironclad"], ["jaw_worm", "jaw_worm"]);
+    state = drawCards(state, 0, 5);
+    const cardIndex = state.players[0].hand.indexOf("strike_r");
+    const enemy1HpBefore = state.enemies[1].hp;
+    const next = playCard(state, cardIndex, { targetIndex: 1 });
+    expect(next.enemies[1].hp).toBeLessThan(enemy1HpBefore);
+    expect(next.enemies[0].hp).toBe(state.enemies[0].hp);
+  });
 });
 
 describe("endTurn - indexed player", () => {