diff --git a/TableturfBattleClient/index.html b/TableturfBattleClient/index.html
index 0c4350e..1c34925 100644
--- a/TableturfBattleClient/index.html
+++ b/TableturfBattleClient/index.html
@@ -241,6 +241,7 @@
 						</tr>
 					</table>
 				</div>
+				<div id="passHint" hidden>Select a card to discard.</div>
 				<div id="handContainer"></div>
 
 				<div id="playRow">
@@ -372,6 +373,8 @@
 			<div class="playContainer" data-index="2"></div>
 			<div class="playContainer" data-index="0"></div>
 
+			<div id="playHint" hidden></div>
+
 			<div id="testPlacementList"></div>
 		</div>
 		<div id="deckListPage" hidden>
diff --git a/TableturfBattleClient/src/Board.ts b/TableturfBattleClient/src/Board.ts
index 347782d..803ef8d 100644
--- a/TableturfBattleClient/src/Board.ts
+++ b/TableturfBattleClient/src/Board.ts
@@ -124,14 +124,14 @@ class Board {
 				var x2 = x + dx;
 				var y2 = y + dy;
 				if (x2 < 0 || x2 >= this.grid.length || y2 < 0 || y2 >= this.grid[x2].length)
-					return "It cannot overlap a wall or out of bounds.";  // Out of bounds.
+					return 'It cannot be over a wall.';  // Out of bounds.
 				const space = this.grid[x2][y2];
 				if (space == Space.Wall || space == Space.OutOfBounds)
-					return "It cannot overlap a wall or out of bounds.";
+					return 'It cannot be over a wall.';
 				if (space >= Space.SpecialInactive1)
-					return "It cannot overlap a special space."
+					return `It cannot be over${' <div class="playHintSpecial" aria-label="Special space">&nbsp;</div>'.repeat(Math.max(currentGame?.players?.length ?? 0, 2))}.`;
 				if (space != Space.Empty && !isSpecialAttack)
-					return "It cannot overlap existing ink without a special attack.";
+					return 'It cannot be over inked spaces.';
 				if (!isAnchored) {
 					// A normal play must be adjacent to ink of the player's colour.
 					// A special attack must be adjacent to a special space of theirs.
@@ -152,7 +152,7 @@ class Board {
 				}
 			}
 		}
-		return isAnchored ? null : (isSpecialAttack ? "It must be next to one of your special spaces." : "It must be next to your turf.");
+		return isAnchored ? null : (isSpecialAttack ? 'It\'s not next to <div class="playHintSpecial">&nbsp;</div>.' : 'It\'s not touching your colour of ink.');
 	}
 
 	refreshHighlight() {
diff --git a/TableturfBattleClient/src/Pages/GamePage.ts b/TableturfBattleClient/src/Pages/GamePage.ts
index d82d88e..0d76646 100644
--- a/TableturfBattleClient/src/Pages/GamePage.ts
+++ b/TableturfBattleClient/src/Pages/GamePage.ts
@@ -6,6 +6,7 @@ const handButtons: CardButton[] = [ ];
 
 const passButton = CheckButton.fromId('passButton');
 const specialButton = CheckButton.fromId('specialButton');
+const passHint = document.getElementById('passHint')!;
 const gameButtonsContainer = document.getElementById('gameButtonsContainer')!;
 const rotateLeftButton = document.getElementById('rotateLeftButton') as HTMLButtonElement;
 const rotateRightButton = document.getElementById('rotateRightButton') as HTMLButtonElement;
@@ -22,6 +23,9 @@ const replayPreviousButton = document.getElementById('replayPreviousButton')!;
 const flipButton = document.getElementById('flipButton') as HTMLButtonElement;
 let replayAnimationAbortController: AbortController | null = null;
 
+const playHint = document.getElementById('playHint')!;
+let playHintTimeout: number | null = null;
+
 const shareReplayLinkButton = document.getElementById('shareReplayLinkButton') as HTMLButtonElement;
 let canShareReplay = false;
 
@@ -449,6 +453,30 @@ function updateStats(playerIndex: number, scores: number[]) {
 	playerBars[playerIndex].statPassesElement.innerText = currentGame.players[playerIndex].passes.toString();
 }
 
+function clearPlayHint() {
+	playHint.hidden = true;
+	if (playHintTimeout) {
+		clearTimeout(playHintTimeout);
+		playHintTimeout = null;
+	}
+}
+function showPlayHint(html: string) {
+	clearPlayHint();
+	playHint.innerHTML = html;
+	playHint.className = '';
+	playHint.hidden = false;
+}
+function showPlayHintError(html: string) {
+	playHint.className = !playHint.hidden && html == playHint.innerHTML ? 'playError repeated' : 'playError';
+	if (playHintTimeout) {
+		clearTimeout(playHintTimeout!);
+		resetAnimation(playHint);
+	}
+	playHint.innerHTML = html;
+	playHint.hidden = false;
+	playHintTimeout = setTimeout(() => playHint.hidden = true, 5000);
+}
+
 /** Shows the ready indication for the specified player. */
 function showReady(playerIndex: number) {
 	const el = document.createElement('div');
@@ -499,6 +527,8 @@ function lockGamePage() {
 	for (const el of handButtons) el.enabled = false;
 	passButton.enabled = false;
 	specialButton.enabled = false;
+	passHint.hidden = true;
+	clearPlayHint();
 }
 
 async function playInkAnimations(data: {
@@ -756,7 +786,9 @@ function redrawButton_click(e: MouseEvent) {
 
 function passButton_input() {
 	board.autoHighlight = !passButton.checked;
+	passHint.hidden = !passButton.checked;
 	if (passButton.checked) {
+		clearPlayHint();
 		specialButton.checked = false;
 		board.cardPlaying = null;
 		board.specialAttack = false;
@@ -776,6 +808,8 @@ passButton.input.addEventListener('input', passButton_input);
 function specialButton_input() {
 	board.specialAttack = specialButton.checked;
 	if (specialButton.checked) {
+		passHint.hidden = true;
+		showPlayHint('Unleash it next to <div class="playHintSpecial">&nbsp;</div>!');
 		passButton.checked = false;
 		board.autoHighlight = true;
 		for (let i = 0; i < 4; i++) {
@@ -784,6 +818,7 @@ function specialButton_input() {
 				handButtons[i].checked = false;
 		}
 	} else {
+		clearPlayHint();
 		for (let i = 0; i < 4; i++) {
 			handButtons[i].enabled = canPlayCard[i];
 			if (!canPlayCard[i])
@@ -817,7 +852,7 @@ board.onsubmit = (x, y) => {
 		return;
 	const message = board.checkMoveLegality(currentGame.me.playerIndex, board.cardPlaying, x, y, board.cardRotation, board.specialAttack);
 	if (message != null) {
-		alert(message);
+		showPlayHintError(message);
 		return;
 	}
 	if (testMode) {
diff --git a/TableturfBattleClient/src/TimeLabel.ts b/TableturfBattleClient/src/TimeLabel.ts
index 310c2d3..15827dc 100644
--- a/TableturfBattleClient/src/TimeLabel.ts
+++ b/TableturfBattleClient/src/TimeLabel.ts
@@ -76,14 +76,8 @@ class TimeLabel {
 	private updateWarningState() {
 		if (!this.faded && this.timeLeft != null && this.timeLeft <= 10) {
 			this.contentElement.classList.add('warning');
-			this.resetAnimation();
+			resetAnimation(this.contentElement);
 		} else
 			this.contentElement.classList.remove('warning');
 	}
-
-	private resetAnimation() {
-		this.contentElement.style.animation = 'none';
-		this.contentElement.offsetHeight;  // Trigger a reflow.
-		this.contentElement.style.animation = '';
-	}
 }
diff --git a/TableturfBattleClient/src/app.ts b/TableturfBattleClient/src/app.ts
index d3e02e1..cd39891 100644
--- a/TableturfBattleClient/src/app.ts
+++ b/TableturfBattleClient/src/app.ts
@@ -628,6 +628,12 @@ function clearChildren(el: Element) {
 	while (el2 = el.firstChild)
 		el.removeChild(el2);
 }
+function resetAnimation(el: HTMLElement) {
+	el.style.animation = 'none';
+	el.offsetHeight;  // Trigger a reflow.
+	el.style.animation = '';
+}
+
 
 document.getElementById('noJSPage')!.innerText = 'Loading client...';
 
diff --git a/TableturfBattleClient/tableturf.css b/TableturfBattleClient/tableturf.css
index 40aeb0c..58fa65b 100644
--- a/TableturfBattleClient/tableturf.css
+++ b/TableturfBattleClient/tableturf.css
@@ -353,14 +353,25 @@ dialog::backdrop {
 	row-gap: 4px;
 }
 
-.cardSpecialPoint {
+.cardSpecialPoint, .playHintSpecial {
 	display: inline-block;
 	color: transparent;
 	background: var(--player-special-colour);
 	width: 1ch;
 	height: 1ch;
+	vertical-align: middle;
+}
+.cardSpecialPoint {
 	margin-right: 0.3em;
 }
+.playHintSpecial {
+	width: 1.5ch;
+	height: 1.5ch;
+}
+.playHintSpecial:nth-of-type(1):not(:last-of-type) { background: var(--special-colour-1); }
+.playHintSpecial:nth-of-type(2) { background: var(--special-colour-2); }
+.playHintSpecial:nth-of-type(3) { background: var(--special-colour-3); }
+.playHintSpecial:nth-of-type(4) { background: var(--special-colour-4); }
 
 .card::before {
 	/* If it exists */
@@ -553,6 +564,14 @@ dialog::backdrop {
 	text-align: center;
 }
 
+#passHint:not([hidden]) {
+	position: absolute;
+	margin: 0 0 35em 1em;
+	padding: 0.5em 1em;
+	background: #80808080;
+	border-radius: 0.5em;
+}
+
 #playRow:not([hidden]) {
 	display: grid;
 	grid-template-columns: 1fr 1fr;
@@ -706,7 +725,7 @@ label[for="flipBox"] {
 	bottom: 0;
 }
 
-.playContainer { text-align: center; }
+.playContainer { text-align: center; margin: 8em 0; }
 
 .playContainer[data-index="2"] { grid-column: play-column-2; grid-row: 2 / -1; align-self: end; }
 .playContainer[data-index="1"] { grid-column: play-column-2; grid-row: 1 / 4; align-self: start; }
@@ -722,6 +741,40 @@ label[for="flipBox"] {
 	margin: 0;
 }
 
+#playHint {
+	grid-column: -3 / -1; grid-row: -2 / -1; align-self: end;
+	justify-self: end;
+	margin: 0 3em 1.5em 0;
+	font-size: larger;
+	padding: 0 0.5em;
+	background: #00000080;
+	border-radius: 0.5em;
+}
+#playHint.playError {
+	animation: 1s infinite playHintError;
+}
+#playHint.playError.repeated {
+	animation: 1s infinite playHintError, 0.5s linear 1 playHintShake;
+}
+@keyframes playHintError {
+	from { background: #ff0000ff; }
+	50% { background: #ff000080; }
+	to { background: #ff0000ff; }
+}
+@keyframes playHintShake {
+	0% { transform: translate(1px, 1px); }
+	10% { transform: translate(-1px, -2px); }
+	20% { transform: translate(-3px, 0px); }
+	30% { transform: translate(3px, 2px); }
+	40% { transform: translate(1px, -1px); }
+	50% { transform: translate(-1px, 2px); }
+	60% { transform: translate(-3px, 1px); }
+	70% { transform: translate(3px, 1px); }
+	80% { transform: translate(-1px, -1px); }
+	90% { transform: translate(1px, 2px); }
+	100% { transform: translate(0px, 0px); }
+}
+
 #testPlacementList {
 	display: none;
 }
@@ -1331,6 +1384,10 @@ label[for="flipBox"] {
 		min-height: 12em;
 	}
 
+	#passHint:not([hidden]) {
+		margin: 0;
+	}
+
 	#scoreSection:not([hidden]) {
 		grid-column: 1;
 		grid-row: 2;
@@ -1338,7 +1395,7 @@ label[for="flipBox"] {
 		grid-template-columns: 1fr;
 	}
 
-	#turnNumberContainer {
+	#timeSection {
 		grid-column: 1;
 		grid-row: 2;
 		margin: 0;
@@ -1404,6 +1461,12 @@ label[for="flipBox"] {
 		margin-top: 5em;
 	}
 
+	#playHint {
+		grid-column: 1 / -1;
+		grid-row: 2;
+		margin: 0 1em 0 0;
+	}
+
 	/* Deck editor - Mobile layout */
 
 	:is(#deckListPage, #deckEditPage):not([hidden]) {