Phyrexian Arena is a great example of how flavor text can be changed, still apply to the card, and tie the history of the game together, allowing the game's past to tie into the present storyline (at the time)
These pretty much matched my expectations, but definitely reminded me why I hate printers
The easiest way to do this is to start with your win condition and work backwards
All of these cards allow you to draw, but have very heavy restrictions placed on them
Hero Strike I like games that allow me to take on the role of a mad scientist, conjuring impossible beasts that are unbeatable
For instance, if you beat the first Limitation, and you haven't obtained a Vorse Raider, you now have one in your trunk, as well as one of every other previously-unowned Warrior and Beast-Warrior-Type