A lot of the guides on the forums can require rare cards, and if you don't have a good starter deck, you won't be getting anywhere. Here's the deck I used to get places:
Warning: I bought a few more cards. This is not the starter deck.
Hover over cards for details, click for permalink
4sa 4sa 4sa 4sa 4t3 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l8 5l9 5l9 5la 5lb 5lb 5lb 5lc 5lc 5le 5le 5lf 5lf 5lf 5lf 5lf 5lf 5oc 5oc 5oc 5oc 5oc 5oe 5oh 5ok 8pq
How to do it: First, you need to put into play a Pegasus, or a Wyrm. When you have that down, use as many blessings as possible on them. Use the "Dive" abillity, too.
Advantages: Each blessing adds 3/3, and the Dive Abillity
adds x2/0. That means, if you've used 6 blessings on one Pegasus, you've added 18/18. That means you have 21/20. And if you use the dive abillity, thats 42/20.
Disadvantages: Parallel universe. Lollllll.
Disclaimer: This is not a very good deck, because it forces you to rely on your blessing cards. There are things that can counter that, so by all means, if you can afford a better deck, get it.