diff --git a/resources/opcodes.json b/resources/opcodes.json
index e60b5fb..405f241 100644
--- a/resources/opcodes.json
+++ b/resources/opcodes.json
@@ -304,6 +304,11 @@
             "name": "UpdateInventorySlot",
             "opcode": 435,
             "size": 64
+        },
+        {
+            "name": "EffectResult",
+            "opcode": 431,
+            "size": 96
         }
     ],
     "ClientZoneIpcType": [
diff --git a/src/ipc/zone/action_result.rs b/src/ipc/zone/action_result.rs
index 033f06e..d848e5b 100644
--- a/src/ipc/zone/action_result.rs
+++ b/src/ipc/zone/action_result.rs
@@ -39,6 +39,8 @@ pub enum EffectKind {
     },
     #[brw(magic = 27u8)]
     BeginCombo,
+    #[brw(magic = 14u8)]
+    Unk1 { unk1: u8, unk2: u32, effect_id: u8 }, // seen during sprint
 }
 
 #[derive(Debug, Eq, PartialEq, Clone, Copy, Default, Deserialize, Serialize)]
@@ -190,4 +192,41 @@ mod tests {
             ObjectId(0x40070E42)
         );
     }
+
+    #[test]
+    fn read_actionresult_sprint() {
+        let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        d.push("resources/tests/action_result_sprint.bin");
+
+        let buffer = read(d).unwrap();
+        let mut buffer = Cursor::new(&buffer);
+
+        let action_result = ActionResult::read_le(&mut buffer).unwrap();
+        assert_eq!(action_result.main_target.object_id, ObjectId(277554542));
+        assert_eq!(action_result.action_id, 3);
+        assert_eq!(action_result.unk1, 776386); // TODO: probably means this field is wrong
+        assert_eq!(action_result.animation_lock_time, 0.6);
+        assert_eq!(action_result.unk2, 3758096384); // TODO: ditto
+        assert_eq!(action_result.hidden_animation, 1);
+        assert_eq!(action_result.rotation, 2.6254003);
+        assert_eq!(action_result.action_animation_id, 3);
+        assert_eq!(action_result.variation, 0);
+        assert_eq!(action_result.flag, 1);
+        assert_eq!(action_result.unk3, 0);
+        assert_eq!(action_result.effect_count, 1);
+        assert_eq!(action_result.unk4, 0);
+        assert_eq!(action_result.unk5, [0; 6]);
+
+        // effect 0: unk
+        assert_eq!(
+            action_result.effects[0].kind,
+            EffectKind::Unk1 {
+                unk1: 0,
+                unk2: 7728,
+                effect_id: 50
+            }
+        );
+
+        assert_eq!(action_result.target_id_again.object_id, ObjectId(277554542));
+    }
 }
diff --git a/src/ipc/zone/effect_result.rs b/src/ipc/zone/effect_result.rs
new file mode 100644
index 0000000..4f44117
--- /dev/null
+++ b/src/ipc/zone/effect_result.rs
@@ -0,0 +1,58 @@
+use binrw::binrw;
+
+use crate::common::ObjectId;
+
+#[binrw]
+#[brw(little)]
+#[derive(Clone, Debug, Default)]
+pub struct EffectEntry {
+    pub index: u8,
+    pub unk1: u8,
+    pub id: u16,
+    pub param: u16,
+    pub unk2: u16,
+    pub duration: f32,
+    pub source_actor_id: ObjectId,
+}
+
+#[binrw]
+#[brw(little)]
+#[derive(Clone, Debug, Default)]
+pub struct EffectResult {
+    pub unk1: u32,
+    pub unk2: u32,
+    pub target_id: ObjectId,
+    pub current_hp: u32,
+    pub max_hp: u32,
+    pub current_mp: u16,
+    pub unk3: u8,
+    pub class_id: u8,
+    pub shield: u8,
+    pub entry_count: u8,
+    pub unk4: u16,
+    #[brw(pad_after = 4)] // padding
+    pub statuses: [EffectEntry; 4],
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{fs::read, io::Cursor, path::PathBuf};
+
+    use binrw::BinRead;
+
+    use super::*;
+
+    #[test]
+    fn read_effectresult() {
+        let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        d.push("resources/tests/effect_result.bin");
+
+        let buffer = read(d).unwrap();
+        let mut buffer = Cursor::new(&buffer);
+
+        let effect_result = EffectResult::read_le(&mut buffer).unwrap();
+        assert_eq!(effect_result.unk1, 1);
+        assert_eq!(effect_result.unk2, 776386);
+        assert_eq!(effect_result.target_id, ObjectId(277554542));
+    }
+}
diff --git a/src/ipc/zone/mod.rs b/src/ipc/zone/mod.rs
index e9c6880..9a9d711 100644
--- a/src/ipc/zone/mod.rs
+++ b/src/ipc/zone/mod.rs
@@ -94,6 +94,9 @@ pub use object_spawn::ObjectSpawn;
 mod quest_active_list;
 pub use quest_active_list::QuestActiveList;
 
+mod effect_result;
+pub use effect_result::EffectResult;
+
 use crate::COMPLETED_LEVEQUEST_BITMASK_SIZE;
 use crate::COMPLETED_QUEST_BITMASK_SIZE;
 use crate::TITLE_UNLOCK_BITMASK_SIZE;
@@ -523,6 +526,8 @@ pub enum ServerZoneIpcData {
         /// Always 0x7530_0000
         unk4: u32,
     },
+    #[br(pre_assert(*magic == ServerZoneIpcType::EffectResult))]
+    EffectResult(EffectResult),
     Unknown {
         #[br(count = size - 32)]
         unk: Vec<u8>,
@@ -1034,6 +1039,10 @@ mod tests {
                     unk4: 0,
                 },
             ),
+            (
+                ServerZoneIpcType::EffectResult,
+                ServerZoneIpcData::EffectResult(EffectResult::default()),
+            ),
         ];
 
         for (opcode, data) in &ipc_types {