diff --git a/packages/web/src/App.svelte b/packages/web/src/App.svelte
index 4901408..a35d3d7 100644
--- a/packages/web/src/App.svelte
+++ b/packages/web/src/App.svelte
@@ -3171,6 +3171,8 @@
         <Board
           {view}
           edgeSelectMode={edgeSelectMode && yourMoment}
+          punchFrom={trollInHand ? (view.creatures.find((c) => c.id === selectedCreature)?.position ?? null)
+            : punchWallMode ? (me?.position ?? null) : null}
           selectedCreatureId={selectedCreature}
           onCellClick={clickCell}
           onEdgeClick={clickEdge}
diff --git a/packages/web/src/Board.svelte b/packages/web/src/Board.svelte
index 6043c7b..32b923d 100644
--- a/packages/web/src/Board.svelte
+++ b/packages/web/src/Board.svelte
@@ -2,7 +2,7 @@
   import type { Component } from "svelte";
   import type { GameView, SightTrace } from "@wizwar/engine";
   import type { Side } from "@wizwar/engine";
-  import { fearCells } from "@wizwar/engine";
+  import { edgeKey, fearCells } from "@wizwar/engine";
   import type { BoardFx } from "./fx";
   import { colorIndexOf as sharedColorIndex, wizardColor } from "./colors";
   import { CREATURE_ART, objectArt, TERRAIN_ART, tokenArt } from "./art";
@@ -20,6 +20,7 @@
   let {
     view,
     edgeSelectMode = false,
+    punchFrom = null,
     selectedCreatureId = null,
     onCellClick,
     onEdgeClick,
@@ -43,6 +44,9 @@
   }: {
     view: GameView;
     edgeSelectMode?: boolean;
+    /** A puncher's square, wizard or troll: only the walls and doors on its
+     * four sides can be struck, so only those lines light. */
+    punchFrom?: { x: number; y: number } | null;
     selectedCreatureId?: string | null;
     onCellClick?: (cell: { x: number; y: number }) => void;
     onEdgeClick?: (cell: { x: number; y: number }, side: Side) => void;
@@ -209,7 +213,18 @@
       if (side === "S") boxes.push({ cell: c, side, x: c.x * CELL + 4, y: (c.y + 1) * CELL - 6, w: CELL - 8, h: 12 });
       if (side === "N") boxes.push({ cell: c, side, x: c.x * CELL + 4, y: c.y * CELL - 6, w: CELL - 8, h: 12 });
     }
-    return boxes;
+    if (!punchFrom) return boxes;
+    const beside = (b: { cell: { x: number; y: number }; side: Side }) => {
+      const far = b.side === "E" ? { x: b.cell.x + 1, y: b.cell.y } : b.side === "W" ? { x: b.cell.x - 1, y: b.cell.y }
+        : b.side === "S" ? { x: b.cell.x, y: b.cell.y + 1 } : { x: b.cell.x, y: b.cell.y - 1 };
+      const at = (c: { x: number; y: number }) => c.x === punchFrom!.x && c.y === punchFrom!.y;
+      return at(b.cell) || at(far);
+    };
+    const solid = (b: { cell: { x: number; y: number }; side: Side }) => {
+      const state = view.board.edges[edgeKey(b.cell, b.side)];
+      return state === "wall" || state === "door";
+    };
+    return boxes.filter((b) => beside(b) && solid(b));
   });
 
   // FEAR's dread: three spaces in every direction, straight through walls