diff --git a/docs/SIM.md b/docs/SIM.md
index 592442dd..0f66de58 100644
--- a/docs/SIM.md
+++ b/docs/SIM.md
@@ -963,7 +963,7 @@ Unknown subprofessions fall back to the profession default (test `professions.te
   `['heal', tgt, amount]`, `['skill', id, 1|0]`, `['die', id, reason]`, `['leak', id]`, `['status', id, key, 1|0]`,
   `['fx', kind, x, y, extra]` (`hitCap` `{ id, n }`: a leader's hit cancelled by 限伤 — the renderer draws nothing),
   `['layer', playerId, bondId, n]` (n = the layers actually added, capped at 999), `['bounty', playerId, coins]`.
-- `UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, motion?, boss?, uid?, skillIndex? }` (`skillIndex`: an ally's equipped skill, DESIGN §16)
+- `UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, motion?, boss?, uid?, skillIndex?, form? }` (`skillIndex`: an ally's equipped skill, DESIGN §16; `form`: an enemy's mode recorded by content as `unit.form` — 暴鸰 `'bombed'` after its drop — for views built later)
   (`dir` = the unit direction, allies meaningful, enemies 'RIGHT'; `facing` = its horizontal sign for sprite flipping)
   (`spine`/`avatar` are asset ids from data).
 - flags: UF bits (blocked 1, stunned 2, frozen 4, stealth 8 — 隐匿 or an ally's 迷彩 — skill 16, shield 32, invuln 64, cold 128, sleep 256, flying 512);
diff --git a/public/js/render/app.js b/public/js/render/app.js
index 2e145fa4..5ba7ea59 100644
--- a/public/js/render/app.js
+++ b/public/js/render/app.js
@@ -1296,6 +1296,8 @@ export async function createFieldView(host, options = {}) {
       // tap hands them to the detail card (a teammate's unit shows its owner's skill / module)
       skillIndex: Number.isInteger(u.skillIndex) ? u.skillIndex : undefined,
       moduleId: typeof u.moduleId === 'string' ? u.moduleId : undefined,
+      // an enemy's mode already taken (UnitInfo.form: 暴鸰 'bombed'): a field opened later draws it (units.js FORMS)
+      form: typeof u.form === 'string' ? u.form : undefined,
     };
     infos.set(info.id, info);
     return info;
diff --git a/server/sim/content/enemies.js b/server/sim/content/enemies.js
index 1954fe4e..b456a5fa 100644
--- a/server/sim/content/enemies.js
+++ b/server/sim/content/enemies.js
@@ -1502,6 +1502,7 @@ function kitBombd(ab) {
         if (!e.alive) return;
         const atk = e.s.atk;
         b._ev(['atk', e.id, t.id, 'droneBomb']);
+        e.form = 'bombed';                                   // UnitInfo.form: a view built later draws it bomb-less
         b.fx('phase', { x: e.x, y: e.y, id: e.id, kind: 'bombed' });
         b.addProjectile({ from: e, target: t, speed: PROJECTILE_SPEEDS.droneBomb, visual: 'droneBomb', source: e, hitDead: true,
           onHit: (c) => land(b, e, atk, c.target, c.x, c.y) });
diff --git a/server/sim/snapshot.js b/server/sim/snapshot.js
index 5525bfc3..49d4214d 100644
--- a/server/sim/snapshot.js
+++ b/server/sim/snapshot.js
@@ -1,8 +1,10 @@
 // server/sim/snapshot.js — compact serialization for clients (DESIGN §8.2).
 //
 // b.snap  = { fieldId, t, units: [[id, x, y, hp, maxHp, sp, spMax, flags, anim]], dp, killed, total }
-// UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, skillIndex?, moduleId? }
-//   dir = 'UP'|'RIGHT'|'DOWN'|'LEFT' (allies: the deploy direction, sim/dir.js); facing = its horizontal sign (±1).
+// UnitInfo = { id, kind, side, ownerId, defId, name, tier, golden, spine, avatar, x, y, facing, dir, maxHp, skillIndex?, moduleId?, form? }
+//   dir = 'UP'|'RIGHT'|'DOWN'|'LEFT' (allies: the deploy direction, sim/dir.js); facing = its horizontal sign (±1);
+//   form = an enemy's current mode (`unit.form`, the last fx 'phase' kind content recorded — 暴鸰 'bombed'), so a view
+//   built after the change (a field opened mid-battle) draws it (render/units.js FORMS).
 // flags bits & anim codes come from shared/constants.js (UF / ANIM).
 
 import { UF, ANIM } from '../../shared/constants.js';
@@ -33,6 +35,7 @@ export function unitInfo(u) {
     motion: u.motion === 'FLY' ? 'FLY' : undefined,
     boss: u.isBoss ? true : undefined,
     uid: u.uid ?? undefined,
+    form: typeof u.form === 'string' ? u.form : undefined,
     // DESIGN §16: the equipped skill's index (the renderer / audio pick that skill's Spine clip and sound)
     skillIndex: u.side === 'ally' && Number.isInteger(d.skill?.index) ? d.skill.index : undefined,
     // DESIGN §16: an elite ally's equipped module (uniEquipId | 'none'; display only — a teammate's unit in a shared
diff --git a/test/render/feedback1d-bombd.test.js b/test/render/feedback1d-bombd.test.js
index a00f4cf1..cb937404 100644
--- a/test/render/feedback1d-bombd.test.js
+++ b/test/render/feedback1d-bombd.test.js
@@ -88,6 +88,13 @@ describe('D4 暴鸰: the drone lets go of its bomb on screen', () => {
     assert.equal(v.atkInterval, 5, 'a one-off drop leaves the attack rhythm alone');
   });
 
+  test('render/app.js keeps UnitInfo.form (a field opened after the drop) and hands the atk kind to the view', () => {
+    const src = readFileSync(path.join(ROOT, 'public/js/render/app.js'), 'utf8');
+    assert.match(src, /function addInfo\(u\)[\s\S]{0,2000}form: typeof u\.form === 'string' \? u\.form : undefined/);
+    assert.match(src, /src\.onAttack\?\.\(tgt, now, e\[3\]\)/);
+    assert.match(src, /v\.windUp\(t - upcomingT, e\[3\]\)/);
+  });
+
   test('the drop draws a falling bomb at the sim\'s speed and the mode change draws nothing of its own', () => {
     assert.ok(PROJ.droneBomb, 'PROJ.droneBomb');
     assert.equal(PROJ.droneBomb.speed, PROJECTILE_SPEEDS.droneBomb);
diff --git a/test/sim/feedback1d-bombd.test.js b/test/sim/feedback1d-bombd.test.js
index 153d2b3d..d6d36a79 100644
--- a/test/sim/feedback1d-bombd.test.js
+++ b/test/sim/feedback1d-bombd.test.js
@@ -70,6 +70,7 @@ describe('D4 暴鸰: the bomb leaves the drone and lands', () => {
     assert.ok(Math.abs(relT - castAt - RELEASE) <= TICK + 1e-9, `released ${(relT - castAt).toFixed(3)} s after the trigger (OnAttack ${RELEASE})`);
     const phase = log.find(([, ev]) => ev[0] === 'fx' && ev[1] === 'phase');
     assert.ok(phase && phase[1][4].kind === 'bombed' && Math.abs(phase[0] - relT) < 1e-9, 'the model drops to its bomb-less mode at the release');
+    if (drone.alive) assert.equal(b.fieldMeta().units.find((u) => u.id === drone.id).form, 'bombed', 'a field opened later draws it bomb-less');
     assert.ok(hitAt != null, 'the bomb lands');
     assert.equal(firstHit.id, relEv[2], 'on the operator it was dropped on');
     assert.ok(hitAt - relT > TICK, `then flies (${(hitAt - relT).toFixed(3)} s at ${PROJECTILE_SPEEDS.droneBomb} tiles/s)`);