diff --git a/client_pack/index.toml b/client_pack/index.toml
index 25d8f48..b0a4416 100644
--- a/client_pack/index.toml
+++ b/client_pack/index.toml
@@ -887,7 +887,7 @@ metafile = true
 
 [[files]]
 file = "mods/worldportal.pw.toml"
-hash = "5a4ae7824648c6b90b67dd6d913b5516f8ea180f72ac83d6c810293bcb535f06"
+hash = "6c68bccb9ef922f1bd2f012b41fb278eeb4f37b0120407556865bedf7cd43fdb"
 metafile = true
 
 [[files]]
diff --git a/client_pack/mods/worldportal.pw.toml b/client_pack/mods/worldportal.pw.toml
index 223adf2..1fbb433 100644
--- a/client_pack/mods/worldportal.pw.toml
+++ b/client_pack/mods/worldportal.pw.toml
@@ -1,11 +1,11 @@
-name = "World Portal"
-filename = "worldportal-neoforge-0.0.10+1.21.jar"
+name = "World Portal (patched - no EntityLMixin, fixes sable mixin conflict)"
+filename = "worldportal-neoforge-0.0.10+1.21-patched.jar"
 side = "server"
 
 [download]
-url = "https://cdn.modrinth.com/data/A2PZGios/versions/kitApnnw/worldportal-neoforge-0.0.10%2B1.21.jar"
+url = "https://git.mithraic.cloud/ad3laid3/SciCraft/raw/branch/main/tools/patches/worldportal-neoforge-0.0.10+1.21-patched.jar"
 hash-format = "sha512"
-hash = "81dc2d6b36b133095d5ccdd8e83314c5bb45d3cb8b2f3bf57502c6d952a60b573c40a4ac32a1c9e55bbc15af32f240bcd47ed07949ff472240e60a731199c732"
+hash = "efbf5fac6b4cb89383e4c9477fbada35387c17fdfea9f9e9a063cf6441c5aebd868eedb4114091105d542516e3736c1517242142fff5f9b341a9866ed6e2005e"
 
 [update]
 [update.modrinth]
diff --git a/client_pack/pack.toml b/client_pack/pack.toml
index b4fd156..f80978c 100644
--- a/client_pack/pack.toml
+++ b/client_pack/pack.toml
@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "531f24a0a4e835bddfe0cd96771c11532277119c7bb0aec049011cb1fea663ac"
+hash = "f854fe332229eab4108b858886c9773f021f831ce78b4d7c74193bc9ddb65d2c"
 
 [versions]
 minecraft = "1.21.1"
diff --git a/server_pack/index.toml b/server_pack/index.toml
index a424458..35b5c1d 100644
--- a/server_pack/index.toml
+++ b/server_pack/index.toml
@@ -728,5 +728,5 @@ metafile = true
 
 [[files]]
 file = "mods/worldportal.pw.toml"
-hash = "5a4ae7824648c6b90b67dd6d913b5516f8ea180f72ac83d6c810293bcb535f06"
+hash = "6c68bccb9ef922f1bd2f012b41fb278eeb4f37b0120407556865bedf7cd43fdb"
 metafile = true
diff --git a/server_pack/mods/worldportal.pw.toml b/server_pack/mods/worldportal.pw.toml
index 223adf2..1fbb433 100644
--- a/server_pack/mods/worldportal.pw.toml
+++ b/server_pack/mods/worldportal.pw.toml
@@ -1,11 +1,11 @@
-name = "World Portal"
-filename = "worldportal-neoforge-0.0.10+1.21.jar"
+name = "World Portal (patched - no EntityLMixin, fixes sable mixin conflict)"
+filename = "worldportal-neoforge-0.0.10+1.21-patched.jar"
 side = "server"
 
 [download]
-url = "https://cdn.modrinth.com/data/A2PZGios/versions/kitApnnw/worldportal-neoforge-0.0.10%2B1.21.jar"
+url = "https://git.mithraic.cloud/ad3laid3/SciCraft/raw/branch/main/tools/patches/worldportal-neoforge-0.0.10+1.21-patched.jar"
 hash-format = "sha512"
-hash = "81dc2d6b36b133095d5ccdd8e83314c5bb45d3cb8b2f3bf57502c6d952a60b573c40a4ac32a1c9e55bbc15af32f240bcd47ed07949ff472240e60a731199c732"
+hash = "efbf5fac6b4cb89383e4c9477fbada35387c17fdfea9f9e9a063cf6441c5aebd868eedb4114091105d542516e3736c1517242142fff5f9b341a9866ed6e2005e"
 
 [update]
 [update.modrinth]
diff --git a/server_pack/pack.toml b/server_pack/pack.toml
index e7a2376..bfd6c84 100644
--- a/server_pack/pack.toml
+++ b/server_pack/pack.toml
@@ -6,7 +6,7 @@ pack-format = "packwiz:1.1.0"
 [index]
 file = "index.toml"
 hash-format = "sha256"
-hash = "8085d282381af5af60852646a2ded387cc45db4d7f60054a0419f701d2f0aa15"
+hash = "458e176e4de0ac679ee808a312155a3376039ebb3b20f42c827270fd183e5f25"
 
 [versions]
 minecraft = "1.21.1"
diff --git a/tools/patches/worldportal-neoforge-0.0.10+1.21-patched.jar b/tools/patches/worldportal-neoforge-0.0.10+1.21-patched.jar
new file mode 100644
index 0000000..997ad46
Binary files /dev/null and b/tools/patches/worldportal-neoforge-0.0.10+1.21-patched.jar differ
diff --git a/tools/pterodactyl-start.sh b/tools/pterodactyl-start.sh
new file mode 100755
index 0000000..a66aea2
--- /dev/null
+++ b/tools/pterodactyl-start.sh
@@ -0,0 +1,80 @@
+#!/bin/bash
+# Pterodactyl NeoForge 21.1.248 startup for SciCraft
+# Egg: ghcr.io/pterodactyl/yolks:java_21
+# Startup Command in Panel: bash tools/pterodactyl-start.sh
+# Or: bash run.sh (if you prefer the egg's default)
+set -e
+
+echo "======================================"
+echo " SciCraft - Pterodactyl Bootstrap"
+echo " NeoForge 21.1.248 | packwiz"
+echo "======================================"
+
+# 1. Install packwiz mods if pack.toml changed
+if [ ! -f packwiz-installer-bootstrap.jar ]; then
+  echo "[Ptero] Downloading packwiz installer..."
+  curl -fsSL -o packwiz-installer-bootstrap.jar https://github.com/packwiz/packwiz-installer-bootstrap/releases/latest/download/packwiz-installer-bootstrap.jar
+fi
+
+echo "[Ptero] Syncing server pack..."
+# Use local server_pack/pack.toml if present (Pterodactyl clones the repo), else fall back to git raw
+if [ -f server_pack/pack.toml ]; then
+  java -jar packwiz-installer-bootstrap.jar -g -s server server_pack/pack.toml
+elif [ -f pack.toml ]; then
+  java -jar packwiz-installer-bootstrap.jar -g -s server pack.toml
+else
+  # Fallback to remote (for Hytale misplaced folder)
+  java -jar packwiz-installer-bootstrap.jar -g -s server https://git.mithraic.cloud/ad3laid3/SciCraft/raw/branch/main/server_pack/pack.toml
+fi
+
+# 2. Install NeoForge server if missing (generates user_jvm_args.txt, unix_args.txt, run.sh)
+if [ ! -f libraries/net/neoforged/neoforge/21.1.248/unix_args.txt ]; then
+  echo "[Ptero] Installing NeoForge 21.1.248 server..."
+  if [ ! -f neoforge-21.1.248-installer.jar ]; then
+    curl -fsSL -o neoforge-21.1.248-installer.jar https://maven.neoforged.net/releases/net/neoforged/neoforge/21.1.248/neoforge-21.1.248-installer.jar
+  fi
+  java -jar neoforge-21.1.248-installer.jar --installServer
+fi
+
+# 3. Ensure user_jvm_args.txt exists and respects Pterodactyl memory
+# Pterodactyl injects {{SERVER_MEMORY}} as env var SERVER_MEMORY (MB)
+# Preset: medium tier (4G-8G). Adjust via presets/low|high if needed
+if [ ! -f user_jvm_args.txt ]; then
+  echo "[Ptero] Creating user_jvm_args.txt from preset..."
+  if [ -f presets/medium/server/jvm-flags.txt ]; then
+    cp presets/medium/server/jvm-flags.txt user_jvm_args.txt
+  elif [ -f server_pack/../presets/medium/server/jvm-flags.txt ]; then
+    cp server_pack/../presets/medium/server/jvm-flags.txt user_jvm_args.txt
+  else
+    # Fallback minimal
+    echo "-Xms4G -Xmx8G -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=8M -XX:G1ReservePercent=20 -Dlog4j2.formatMsgNoLookups=true" > user_jvm_args.txt
+  fi
+fi
+
+# Inject Pterodactyl memory if available (SERVER_MEMORY is in MB)
+if [ -n "$SERVER_MEMORY" ]; then
+  echo "[Ptero] Detected Pterodactyl SERVER_MEMORY=${SERVER_MEMORY}M, patching user_jvm_args.txt..."
+  # Replace -Xmx value with Pterodactyl's allocation
+  sed -i -E "s/-Xmx[0-9]+[GM]/-Xmx${SERVER_MEMORY}M/g" user_jvm_args.txt
+  # Ensure -Xms is half of max or 4G min
+  if grep -q "MaxRAMPercentage" user_jvm_args.txt; then
+    sed -i -E "s/-XX:MaxRAMPercentage=[0-9.]+//g" user_jvm_args.txt
+  fi
+fi
+
+# 4. Ensure run.sh is executable and correct
+if [ ! -f run.sh ]; then
+  echo "[Ptero] run.sh missing, regenerating..."
+  echo '#!/usr/bin/env sh' > run.sh
+  echo 'java @user_jvm_args.txt @libraries/net/neoforged/neoforge/21.1.248/unix_args.txt "$@"' >> run.sh
+fi
+chmod +x run.sh
+
+echo "======================================"
+echo " Starting SciCraft NeoForge 21.1.248"
+echo " user_jvm_args.txt: $(cat user_jvm_args.txt | tr '\n' ' ')"
+echo " unix_args.txt exists: $(test -f libraries/net/neoforged/neoforge/21.1.248/unix_args.txt && echo yes || echo no)"
+echo "======================================"
+
+# Pterodactyl expects to keep PID 1 and handle signals, so exec run.sh
+exec bash run.sh nogui