This means that you have access to all of green's land ramp, white's catch-up and taxes, red and black's rituals, and tons of mana artifacts
Since Bloodthirsty Adversary is played in decks with a low mana curve generally, the extra mana you can spend to cast it lets you replay your best spells
Thus, although the complex rules must be followed, the nature of the cards makes for completely different rules in every game
Elsa, Spirit Of Winter Far and away the most oppressive deck of The First Chapter was Ruby/Amethyst Control
The Caesar, Legion's Emperor display commander card is printed with the foil-etched treatment on thick cardstock (great for showing off your commander but not legal in sanctioned play)
I don't want to call them not fun, since they usually are fun