The coolest things I've seen are the Japanese prototype cards
Burn wants to deal 16-20 damage in packets of two or three and Mill wants to flip over 53 cards as quickly as possible
Huey, Dewy, and Louie all have the Support feature, which can give Scrooge a much higher strength, allowing him to be successful in his challenges
Whilst you do need to meet the requirement of having three legendary creatures on your side of the battlefield, this requirement is actually a bit easier to meet than it sounds because Kolvori herself counts towards that, meaning you only need two additional legendary creatures by her side
If this card attacks a Defense position monster, inflict Piercing Damage to your opponent.[/spoiler][/spoiler] [spoiler=Update June 4th, 2015] [spoiler=Enlightment] Equip only to a Spirit monster
Dark Swirl hits for 150 damage, but it guzzles Energy like a dragon at an all-you-can-burn buffet