How do "refinement" processes work for card enhancement in Riftbound?

Refinement processes in Riftbound specifically enable players to upgrade existing cards, enhancing their abilities or overall effectiveness. This involves taking a card that a player already possesses and improving its attributes, like increasing its power or providing additional abilities, which can lead to more strategic advantages in gameplay. This mechanic encourages players to invest in their card collection, making it a central feature of the game's progression system.

Other choices focus on actions that do not align with the concept of card refinement. For instance, downgrading cards, removing cards from play, or imposing random changes to card abilities do not contribute to the strategic development of player decks in the same constructive manner that upgrading does. Hence, the option that emphasizes upgrading existing cards correctly reflects the intended function of refinement processes in the game.