Shadowverse: Evolve Shadowverse is a popular digital CCG with a ruleset that greatly resembles Hearthstone
The most expensive version is the Japanese-exclusive planeswalker event promo, with a market price of $267 on TCGplayer
While that might seem pretty cool at first, now that there are no rules around what cards can and cant be played (other than the ban list), you now suddenly have thousands and thousands of cards you have to somehow choose from in order to figure out what deck/combo you want to use against your opponent
Beyond flashy promotions, the essentials include a reliable license, visible auditing standards, and transparent terms for every feature you plan to use
If the dots appear blurry, move the card or change the focus on your device
Then the instants that sacrifice a dork to draw two cards are next, like the first one in Village Rites or many others