Insert the transparent upgrade card on top of a card in your hand, with the icons visible on the left.

When sleeving, do not cover any icon or text. The cost icon in the top right is the exception. It may be covered by another cost icon.

You may add multiple upgrade cards to 1 sleeved card.

If an upgrade card cannot be inserted because it would cover an icon or text, set it aside. Sleeve it the next time you draw cards.

You cannot upgrade cards in your deck or discard pile.