Life drain, token doublers, and mana engines all multiply in value with more players at the table
Blue-green is one of my favorite color pairs in the game, as it often combines green's love of large creatures and effects that grow them with blue's penchant for card advantage
If you apply Pokey's third ability as a replacement effect to rolling a d20, other than the original effect that called for the d20 roll, all other game effects, including replacement effects and triggered abilities, recognize that you flipped a coin rather than rolled a d20
Specifically if you can meet them and see the cards in person and they allow you to verify its authenticity or provide you with authenticity verification paperwork
Also hitting here is the free six-cost untap six Time Spiral and the flashback-able Echo of Eons and assist-able Game Plan and Time Reversal too that created the "Draw Seven" archetype with Windfall above and Wheel of Fortune stuff in Red
Sharkey, Tyrant of the Shire I actually really like Sharkey, Tyrant of the Shire, and I think it could lead to some very unique gameplay situations