Board Thread:Questions and Answers/@comment-99.25.32.150-20130822020831/@comment-9839593-20130822151149

Shuten Doji calm cant come from invite - the invite system was different at that time I think.

So I'd say it is possible cos you must say these event rewards are conquest cards right (You mentioned 3 cards besides Aqua). This event is doable without very much levelling up. But hey, besides his good cards and money he must still be a noob and does not know how to decently set up an attack team: cos noone (able to have such high cards with skill 20) would have a need for self boost diamond dragon! I must assume the dude must have a Helle (EG is possible w/o levelling), which is still to be prefered over Diamond. (A pure type boost team containing a even an Ibaraki Doji (which he must have from the Shuten Doji calm event) is to be prefered over the same team containing Diamond Dragon)