Flashback gives you more to get on with late game but by proxy will afford you the opportunity to have a stronger early game
Its attacks are nice and perfect to fit into any deck due to its versatility in being a colorless type: Rule the Region (for three colorless energies) has a base 200 damage and can recharge up to 3 energies from your deck for your Pokmon -V as you wish, being extremely powerful, compensating any steep Pokmon (like Gengar-VMax, Lucario-VStar, etc) and/or speeding up other more versatile Pokmon
Phase, you simply turn over the top two cards of your DON
Long-term, that wouldnt be very much fun for anyone
Unfortunately, it lets the controller separate the piles, not the opponent, so the split often favors the Toymakers controller regardless of your decision
This Trap lets you target a Blue-Eyes Monster and make it both unaffected by card effects and protected from destruction by battle during that turn