Laying out your graveyard in an organized fashion can go a long way to making important decisions with clarity
you can use this guy to make Machina Fortress live, or if you have a Special Schedule and Derricrane or Switchyard in hand and don't want to wait for Railcar to go off, you can mill of a Night Express Knight for a faster play as well
Enchantment - Saga Elephant Grass Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Black creatures can't attack you
Of course, it can be used not only with Crystal Beast, but also with Fifty-Fifty Decks
Paying the plot cost on a card counts as a special game action, and therefore you cannot respond to a player paying one, though you can of course respond to the actual casting on the later turn
It's also pricey on the secondary market since it's so powerful and dominating at around $20 here at CoolStuffInc.com but it's worth it