Maintenance for the week of September 22:
· [COMPLETE] NA megaservers for maintenance – September 22, 4:00AM EDT (8:00 UTC) - 10:00AM EDT (14:00 UTC)
· [COMPLETE] EU megaservers for maintenance – September 22, 8:00 UTC (4:00AM EDT) - 14:00 UTC (10:00AM EDT)
Destroying your cards doesn't break the game...

Sadly, was against an NPC during a daily but um... Yeah... There's no limitation it seems to destroying your cards. I figured once you get to less than 5 cards, there will be a bug or something but nope. Game doesn't seem to care at all.