Criptoplasma (Casual)

The Big Idea:
Get to 4 mana as quick as you can using mana ramp creatures, then cast one of your Free-Cast creature generators. Once you have a big creature on the board, copy it using your copy cards and overwhelm the opponent.

Now to be a little more specific, the main card you want to get out on the board and copy is Utvara Hellkite. Its passive ability triggers off any attacking dragon (including itself), and it creates additional 6/6 flying dragon tokens that further trigger its passive. You can probably see how this card gets ridiculous very fast. HOWEVER, combine the ridiculousness of that card with the fact that you can copy it with your copy cards, and this gets ABSOLUTELY CRAZY.

Best Possible Start Example:
Your starting hand is:
1 Yavimaya Coast
1 Island
1 Birds of Paradise
1 Cryptoplasm
1 Elvish Piper
1 Phyrexian Metamorph
1 Utvara Hellkite

TURN 1: You play Yavimaya Coast and tap it to play Birds of Paradise.
TURN 2: You play an Island, then tap your 2 lands and Birds of Paradise to play Cryptoplasm.
TURN 3: Draw a land and play it. Tap your 3 lands and Birds of Paradise to play Elvish Piper.
TURN 4: Tap Birds of Paradise and Elvish Piper to play Utvara Hellkite. Then tap your remaining 3 lands and play Phyrexian Metamorph as a copy of Utvara. You now have two 6/6 flyers by turn 4.
TURN 5: Have Cryptoplasm become a copy of Utvara. You now have 3 Utvara Hellkites (1 original + two copies). Attack with all 3. You will get a total of NINE 6/6 flying tokens!!! See below to see how this works if it's not already clear to you:

Original Utvara attacks triggering its own ability (cause Utvara is a dragon) giving you one 6/6 flying dragon token. However, since you made two identical copies of Utvara, the original Utvara attacking triggers their abilities also. So you get two more 6/6 flyers for a total of 3.

Likewise, when Utvara Copy #1 attacks, it triggers its own ability, PLUS the ability of the original Utvara and the other copy. So it too generates 3 more 6/6 flyers!

And finally, when Copy #2 attacks, it works just like above, resulting in 3 more 6/6 flyers for a total of 9 if you add them all together.

All said and done, you will end Turn #5 with three 6/6 flying Utvara Hellkites, and nine 6/6 flying dragon tokens for a total of Twelve 6/6 flying creatures.

TURN #6:
Each creature token you generated in turn #4 is also a Dragon... so each one (when attacking) will trigger the 3 Utvara passives resulting in 3 more tokens generated. Adding this all up, if you attack with all 12 of your dragons (and somehow don't win the game right there), you will generate 36 more 6/6 flying dragon tokens by the end of this turn.

When things don't line up perfectly:
Use your Augury Owls to scry and as chump blockers. If you need to, use your Elvish Mystics and/or Birds of Paradise as chump blockers too. You only need to make sure you have the 4 mana necessary to use your Free-Cast stuff. Use Cryptoplasms to copy enemy creatures if necessary... and if really desperate, you can use your Metamorphs too.

Don't forget about the sideboard! For example, it may be worthwhile to dump some of your mana ramp (the elvish mystics) for Fog Banks if you'd rather have the extra defense.