As of Ashes of Outland, Hearthstone features more than 4,592 fully playable cards, of which exactly 2,496 cards can be collected by players – Hearthstone Wiki

That’s a lot of cards and I am honest: I don’t know every card text just by the name.

A browser Plugin that helps with that is the one by autocardanywhere.com

Just install it in your browser and it automatically recognises card names on all the pages you visit and instantly turns them into links with image popups. No more manually searching to find-out what cards do, just hover your mouse over the name!

Installed? You should be able to hover over Anyfin Can Happen.

Available for Chrome, Firefox, Opera and Edge

Note: Once installed, you need to change the options. The tool also works for other card games like Gwent, Magic: The Gathering and many more! (I recommend clicking on the Settings and remove the hook on Ignore Dictionary Words)