Being able to choose when to stop is a big benefit for a coin flip card
I have played almost every one of these cards
it tries to use only cards that are Black, Blue, *and* Red in color identity (except for a few artifacts and 2-color cards such as Lieges)
Saddle 1 Fortune's middle ability creates a delayed triggered ability that triggers at end of combat
I read books on them, put puzzles together, subscribed to magazines, went to a musical about them, went to zoo exhibits, watched TV shows and movies, anything and everything I could get my hands on or go to
Jeff tried TCGplayer and his experience getting alternate versions of cards shows it is one of the best options for buying cards directly from individual sellers