Tap the [DISMANTLE] button at MANAGE CARD>ARTIFACT to see the list of available cards to dismantle.
You can dismantle up to 3 cards at a time. Batter, Equipment, and Skill cards can all be dismantled as well.
Accumulated duplicates of max-leveled cards are now kept for dismantling instead of being automatically refunded in gold.

However, you cannot level-down a card to dismantle it.
Artifact EXP can be obtained by dismantling cards, with a chance of obtaining 1.5 times the original amount.

Warning! Once a card is dismantled, it cannot be recovered.