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.
Is it going to be hilarious when you flash this in when someone declares no blockers when youre playing Arcades, The Strategist or Rasaad yn Bashir or Doran, The Siege Tower infect tribal
Second, look at death triggers
Permanents with Daybound can only transformed because of Night & Day
Speaking of and finally getting to her surveil ability, it works great to filter cards off the top before your draw and see what you might want to dig for
The thing that makes them special is that they can tap for two colours of mana and that you can put them into play using fetch lands