diff --git a/.gitignore b/.gitignore
index 9fab2e3..7920a86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
 .env
-.idea/
\ No newline at end of file
+.idea/
+data/
\ No newline at end of file
diff --git a/commands/eval.js b/commands/eval.js
new file mode 100644
index 0000000..cfe9f78
--- /dev/null
+++ b/commands/eval.js
@@ -0,0 +1,124 @@
+const Revolt = require('revolt.js');
+const { client, logger, config } = require('..');
+const { exec } = require('child_process');
+
+let evalEnabled = [];
+let OTP = [];
+let OTPTimer = [];
+
+module.exports = {
+    OTP, evalEnabled, OTPTimer
+}
+
+module.exports.meta = {
+    name: 'eval',
+    aliases: [],
+    description: 'Evaluate code.',
+    devLevel: 99
+}
+
+/**
+ *
+ * @param { Revolt.Message } message
+ * @param { string[] } args
+ */
+module.exports.run = async (message, args) => new Promise(async (resolve, reject) => {
+    if (!evalEnabled[message.author] && process.env['DISABLE_EVAL_OTP'] != 'true') {
+        OTP[message.author] = createOTP();
+        client.channels.sendMessage(message.channel, `OTP has been printed to console. Use \`${config.prefix}verify [code]\` to verify.`);
+        
+        console.log(`Admin authentication required`);
+        console.log(`OTP: \u001b[31;1m${OTP[message.author]}\u001b[0m`);
+        console.log(`Code expires in 120 seconds.`);
+        
+        if (OTPTimer[message.author]) {
+            console.log('Old OTP code has been invalidated.');
+            clearTimeout(OTPTimer[message.author]);
+        }
+        OTPTimer[message.author] = setTimeout(() => {
+            console.log(`OTP Code \u001b[31;1m${OTP[message.author]}\u001b[0m has been invalidated.`);
+            OTP[message.author] = null;
+        }, 120000);
+        return;
+    }
+    
+    let command = args.join(' ');
+    if (command.length == 0) return client.channels.sendMessage(message.channel, `❌ No command provided`);
+    if (command.startsWith('js:')) {
+        // Execute javascript
+        command = command.substring(3);
+        if (command.length == 0) return client.channels.sendMessage(message.channel, `❌ No command provided`);
+        let mesg = await client.channels.sendMessage(message.channel, `Evaluating JavaScript...`);
+        
+        let parseOutput = (output) => {
+            if (output instanceof Error) return `${output.name || 'Error'} : ${output.message}`;
+            if (output instanceof Object) return `${JSON.stringify(output, null, 4)}`;
+            return `${output}`;
+        }
+        
+        try {
+            let output = eval(command);
+            if (output instanceof Promise) {
+                client.channels.editMessage(message.channel, mesg._id, { content: `\`\`\`js\nPromise : Pending\n\`\`\`` });
+                output
+                    .then(val => {
+                        client.channels.editMessage(message.channel, mesg._id, { content: `\`\`\`js\nPromise : Resolved\n${parseOutput(val)}\n\`\`\`` });
+                    })
+                    .catch(val => {
+                        client.channels.editMessage(message.channel, mesg._id, { content: `\`\`\`js\nPromise : Rejected\n${parseOutput(val)}\n\`\`\`` });
+                    });
+            } else {
+                client.channels.editMessage(message.channel, mesg._id, { content: `\`\`\`js\n${parseOutput(output)}\n\`\`\`` });
+            }
+        } catch(e) {
+            client.channels.editMessage(message.channel, mesg._id, { content: `\`\`\`js\n${parseOutput(e)}\n\`\`\`` });
+        }
+    } else {
+        let mesg = await client.channels.sendMessage(message.channel, `Executing: \`${command}\``);
+        
+        let outTxt = '';
+        let cOutTxt = '';
+        let prevTxt = '';
+        let cutLetters = 0;
+        let exited = false;
+        let updateMsg = (msg, exitCode) => {
+            outTxt += `${msg}`
+                .replace(/[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g, '')
+                .replace(/`/g, '\u200b`');
+            while (outTxt.length >= 1920) {
+                outTxt = outTxt.slice(2, outTxt.length);
+                cutLetters++;
+            }
+            
+            let charCutTxt = '';
+            if (cutLetters > 0) charCutTxt = `${cutLetters} character${cutLetters == 1 ? ' has' : 's have'} been cut\n`;
+            let exitText = '';
+            if (exitCode != null) {
+                exitText = `\nExited with code ${exitCode}`;
+                exited = true;
+            }
+            
+            cOutTxt = `${charCutTxt}\`\`\`bash\n${outTxt.trimRight() || 'No output'}\n\`\`\`${exitText}`;
+        }
+        
+        let execution = exec(command);
+        execution.stdout.on('data', updateMsg);
+        execution.stderr.on('data', updateMsg);
+        execution.once('exit', (exitCode) => {
+            updateMsg('', exitCode);
+        });
+        
+        let interval = setInterval(() => {
+            if (cOutTxt != prevTxt) {
+                prevTxt = cOutTxt;
+                client.channels.editMessage(message.channel, mesg._id, { content: cOutTxt });
+            }
+        }, 200);
+    }
+});
+// $\color{red}\text{h}$
+function createOTP() {
+    let code = '';
+    for (let i = 0; i < 6; i++) code += Math.round(Math.random() * 10);
+    return code.substr(0, 6);
+}
\ No newline at end of file
diff --git a/commands/evaloff.js b/commands/evaloff.js
new file mode 100644
index 0000000..7796c58
--- /dev/null
+++ b/commands/evaloff.js
@@ -0,0 +1,30 @@
+const Revolt = require('revolt.js');
+const { client, logger, config } = require('..');
+
+const { OTP, evalEnabled, OTPTimer } = require('./eval');
+
+module.exports.meta = {
+    name: 'evaloff',
+    aliases: [],
+    description: 'Disable eval functionality.',
+    devLevel: 99
+}
+
+/**
+ *
+ * @param { Revolt.Message } message
+ * @param { string[] } args
+ */
+module.exports.run = async (message, args) => new Promise(async (resolve, reject) => {
+    if (OTPTimer[message.author]) clearTimeout(OTPTimer[message.author]);
+    if (evalEnabled[message.author]) {
+        evalEnabled[message.author] = null;
+        OTP[message.author] = null;
+        return client.channels.sendMessage(message.channel, 'Access has been revoked.');
+    }
+    if (OTP[message.author]) {
+        OTP[message.author] = null;
+        return client.channels.sendMessage(message.channel, 'Existing OTP has been invalidated.');
+    }
+    return client.channels.sendMessage(message.channel, 'You were not authenticated.');
+});
\ No newline at end of file
diff --git a/commands/verify.js b/commands/verify.js
new file mode 100644
index 0000000..af63b1d
--- /dev/null
+++ b/commands/verify.js
@@ -0,0 +1,51 @@
+const Revolt = require('revolt.js');
+const { client, logger, config } = require('..');
+
+const { OTP, evalEnabled, OTPTimer } = require('./eval');
+
+const banIntervals = [ 5, 10, 15, 30, 60, 120, 300 ];
+const failedAttempts = [];
+const failedTimeouts = [];
+
+module.exports.meta = {
+    name: 'verify',
+    aliases: [ 'v' ],
+    description: 'Verify dev actions.',
+    devLevel: 1
+}
+
+/**
+ *
+ * @param { Revolt.Message } message
+ * @param { string[] } args
+ */
+module.exports.run = async (message, args) => new Promise(async (resolve, reject) => {
+    if (failedAttempts[message.author] == null) failedAttempts[message.author] = 0;
+    
+    if (failedAttempts[message.author] > 0 && failedTimeouts[message.author] != null) {
+        let timeout = (banIntervals[failedAttempts[message.author] - 1] ?? Infinity) * 1000;
+        if (failedTimeouts[message.author] + timeout > Date.now()) {
+            if (timeout == Infinity)
+                return client.channels.sendMessage(message.channel, `❌ Blocked`);
+            else
+                return client.channels.sendMessage(message.channel, `❌ Blocked for ${timeout / 1000} seconds`);
+        }
+    }
+    
+    let otp = OTP[message.author];
+    let code = args[0];
+    if (!otp) return client.channels.sendMessage(message.channel, 'There is nothing to verify right now.');
+    if (!code) return client.channels.sendMessage(message.channel, 'You need to specify a code.');
+    if (code != otp) {
+        failedAttempts[message.author]++;
+        failedTimeouts[message.author] = Date.now();
+        return client.channels.sendMessage(message.channel, '❌ Invalid code');
+    }
+    
+    logger.warn('Enabled eval for ' + message.author);
+    
+    clearTimeout(OTPTimer[message.author]);
+    evalEnabled[message.author] = true;
+    
+    client.channels.sendMessage(message.channel, `Authenticated - Use \`${config.prefix}evaloff\` to disable`);
+});
\ No newline at end of file