Legitimate "server-side injection" tools are incredibly rare and highly illegal. They are not hosted on public websites with flashy graphics. If a hack existed that could freely generate premium currency from a developer's servers, it would be patched immediately by the developer's security team.
If the site doesn't ask for your password, it will prompt you to download a "Cheat Engine APK" (for mobile) or a browser extension. These files are rarely what they seem. They are often: pwnhack.com farmville 2
Pwnhack.com is a domain that has appeared in search engine results for numerous online games, including Clash of Clans , Candy Crush , and specifically FarmVille 2 . The site typically presents itself as a "cheat engine" or "resource generator." including Clash of Clans