diff --git a/Cargo.lock b/Cargo.lock
index 106267a..31e6c2a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -333,6 +333,16 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
+[[package]]
+name = "erased-serde"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e004d887f51fcb9fef17317a2f3525c887d8aa3f4f50fed920816a688284a5b7"
+dependencies = [
+ "serde",
+ "typeid",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.11"
@@ -904,11 +914,14 @@ checksum = "d3f763c1041eff92ffb5d7169968a327e1ed2ebfe425dac0ee5a35f29082534b"
 dependencies = [
  "bstr",
  "either",
+ "erased-serde",
  "futures-util",
  "mlua-sys",
  "num-traits",
  "parking_lot",
  "rustc-hash",
+ "serde",
+ "serde-value",
 ]
 
 [[package]]
@@ -954,6 +967,15 @@ version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
+[[package]]
+name = "ordered-float"
+version = "2.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68f19d67e5a2795c94e73e0bb1cc1a7edeb2e28efd39e2e1c9b7a40c1108b11c"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -1199,6 +1221,16 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "serde-value"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3a1a3341211875ef120e117ea7fd5228530ae7e7036a779fdc9117be6b3282c"
+dependencies = [
+ "ordered-float",
+ "serde",
+]
+
 [[package]]
 name = "serde_derive"
 version = "1.0.219"
@@ -1492,6 +1524,12 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "typeid"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bc7d623258602320d5c55d1bc22793b57daff0ec7efc270ea7d55ce1d5f5471c"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.18"
diff --git a/Cargo.toml b/Cargo.toml
index 5ad60e2..ac54a86 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -87,7 +87,7 @@ rusqlite = { version = "0.34", features = ["bundled"], default-features = false
 bitflags = { version = "1.3", default-features = false }
 
 # For server-side scripting
-mlua = { version = "0.10", features = ["lua51", "vendored", "send", "async"], default-features = false }
+mlua = { version = "0.10", features = ["lua51", "vendored", "send", "async", "serialize"], default-features = false }
 
 # For character backup decompression
 zip = { version = "2.6", features = ["deflate", "lzma", "bzip2"], default-features = false }
diff --git a/resources/scripts/actions/FastBlade.lua b/resources/scripts/actions/FastBlade.lua
index ee25683..d9595ef 100644
--- a/resources/scripts/actions/FastBlade.lua
+++ b/resources/scripts/actions/FastBlade.lua
@@ -1,6 +1,6 @@
 function doAction(player)
     effects = EffectsBuilder()
-    effects:damage(20)
+    effects:damage("Normal", "Slashing", "Unaspected", 20)
 
     return effects
 end
diff --git a/src/world/ipc/action_result.rs b/src/world/ipc/action_result.rs
index 103fa6f..033f06e 100644
--- a/src/world/ipc/action_result.rs
+++ b/src/world/ipc/action_result.rs
@@ -1,10 +1,11 @@
 use binrw::binrw;
+use serde::{Deserialize, Serialize};
 
 use crate::common::{ObjectTypeId, read_quantized_rotation, write_quantized_rotation};
 
 // TODO: this might be a flag?
 #[binrw]
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Default)]
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Default, Deserialize, Serialize)]
 #[brw(repr = u8)]
 pub enum DamageKind {
     #[default]
@@ -40,7 +41,7 @@ pub enum EffectKind {
     BeginCombo,
 }
 
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Default)]
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Default, Deserialize, Serialize)]
 pub enum DamageType {
     Unknown,
     Slashing,
@@ -71,7 +72,7 @@ impl From<u8> for DamageType {
     }
 }
 
-#[derive(Debug, Eq, PartialEq, Clone, Copy, Default)]
+#[derive(Debug, Eq, PartialEq, Clone, Copy, Default, Deserialize, Serialize)]
 pub enum DamageElement {
     Unknown,
     Fire,
diff --git a/src/world/lua.rs b/src/world/lua.rs
index c925acc..6185ff1 100644
--- a/src/world/lua.rs
+++ b/src/world/lua.rs
@@ -1,4 +1,4 @@
-use mlua::{FromLua, Lua, UserData, UserDataMethods, Value};
+use mlua::{FromLua, Lua, LuaSerdeExt, UserData, UserDataMethods, Value};
 
 use crate::{
     common::{ObjectId, ObjectTypeId, Position, timestamp_secs},
@@ -172,12 +172,16 @@ pub struct EffectsBuilder {
 
 impl UserData for EffectsBuilder {
     fn add_methods<M: UserDataMethods<Self>>(methods: &mut M) {
-        methods.add_method_mut("damage", |_, this, amount: u16| {
+        methods.add_method_mut("damage", |lua, this, (damage_kind, damage_type, damage_element, amount): (Value, Value, Value, u16)| {
+            let damage_kind: DamageKind = lua.from_value(damage_kind).unwrap();
+            let damage_type: DamageType = lua.from_value(damage_type).unwrap();
+            let damage_element: DamageElement = lua.from_value(damage_element).unwrap();
+
             this.effects.push(ActionEffect {
                 kind: EffectKind::Damage {
-                    damage_kind: DamageKind::Normal,
-                    damage_type: DamageType::Slashing,
-                    damage_element: DamageElement::Unaspected,
+                    damage_kind,
+                    damage_type,
+                    damage_element,
                     bonus_percent: 0,
                     unk3: 0,
                     unk4: 0,