Every monster now has its own card. Cards are rare: about 1 in 10,000 kills, bosses included.
New gear can drop with a card slot, and the rarer the piece, the better the chance. Weapons have their own number of slots. Double-click a card in your bag, pick the item and press Insert. A card works while you wear the item: more stats, extra damage against some monsters, a chance to stun, poison or put a foe to sleep, life and SP drain, spells that cast by themselves, short boosts in a fight, and more.
The Card Collector stands next to the smiths in Hodemimes, Prontera, Alfheim and Cognito Harbor. Talk to him to take a card out again, free for now. The card goes back to your bag and the slot stays.
Armour with a card slot or a card can be traded, mailed, stored, sold on the market and used for transmog. Weapons with card slots cannot be moved that way yet.
Item tooltips have a new look: easier to read, values lined up, the card slots with each card's effect, and the piece you wear shown beside the one you point at, weapons too.
Also: the game no longer closes when you kill a Poring or another jelly monster. Rapid Run can be cast at a lower rank again, and a new cast replaces the old one instead of adding to it. Windows and bars draw faster.
Start the launcher to get the update.