<p>The only way that comes to my mind, is checking in your charm list, which creatures you can put the charm on, because that is those are the ones that you have unlocked ^^.</p><p>For this you need to have bought at least one charm 'rune', and have no creature selected on it:</p><p><img alt="" src="https://www.tibiaqa.com/?qa=blob&qa_blobid=6729722003771496800" style="height:347px; width:600px"></p>