Heavily Played cards include cards that have writing on the back, major creasing, folding, major water damage, moderate to major whitening, major border wear, major inking, tearing, pieces missing out of the card, foil cards with major "silvering" or foil peeling, cards with extensive water damage, and cards with extensive all over wear from excessive play
Fury of the Horde Extra combat spells are popular, but there are a lot of them available these days
Clicking a card will add it to the deck, also clicking multiple times will add more to the quantity of the card
This introduces a gacha element to the game, encouraging players to collect particular cards to build a well-rounded and competitive deck
Of course, the age of these two cards undoubtedly plays a large part in their overall value