Yes, but the cards aren’t technically on peakmonsters.

Peakmonsters is a front end tool to access the decentralized card market for splinterlands. Essentially, the same cards you see I. The Splinterlands market are what you see in peakmonsters.

Peakmonsters just gives you extra tools to acquire what you want easier, maybe cheaper, or in higher quantities.

Peakmonsters never transfers you the card in that sense... it’s more like they just directly buy it for you and it’s immediately owned by you.

You will need you Hive Keys from splinterlands to be able to use it. If you haven’t gotten those yet you can do so from the drop down menu I believe by your profile icon. IMPORTANT: make sure to read the information there before you dive into it. You’ll want to understand it.