MTG Tutorials

You can use more less anything to represent tokens, as long as your playgroup is okay with it. I’ve seen players use everything from face-down unsleeved cards, to dice, to green and tan plastic army men to represent tokens before. If you use cards for tokens, sleeving them a different color from your deck seems like a good idea to me.

The value of X while the spell is on the stack is the value that was paid for X. So the CMC of Sphinx’s Revelation while it’s on the stack is 8 if you paid 5 for X.

All the Rally creatures say, “Whenever (this) or another Ally enters the battlefield…”

The Legend Rule only cares about objects controlled by the same player. You and your opponent can each have the same legendary creature in play without a problem. (This didn’t used to be true, but it’s true under the current rules.)

For more on how the Legend Rule works (and used to work), check out:

MTG Tutorials #50: All About Menace

If you want to know more about the steps of combat, I also suggest checking out:

You still have to pay (X). I realize this is confusing with In The Eye of Chaos’s printed text, but if you check out its Gatherer page and read its Oracle text:

http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=202410

then you’ll see ITEOC’s ability is now written as a triggered ability.