And keep your peepers peeled here on EDHREC for more precon guides from yours truly
We decided we liked the back being a copy effect, although one you could only use once because it's uncommon
The strategy is to play cheap, evasive creatures on turn one, use them to get Yuriko into play on turn two, and then use cards like Brainstorm or Senseis Divining Top to manipulate the top of your library, ensuring you reveal a high-cost card like Draco (16 mana) or Blinkmoth Infusion (14 mana) to deal massive damage to the entire table at once.
Nested Shambler
This card is at its best late-game, giving +2/+2 to something like Enraged Huorn, killing a creature, and making a big attack
I'm currently planning to use only official music, but if any musicians would like to join the project to give things some extra flair, that's certainly welcome as well