When attacking with Ava Achiever and using her effect to play Sprite's Call, where can the token be played if you don't control the other battlefield?

Ruling: The token must be played at the battlefield where Ava is attacking (the current battlefield), not at base or the other battlefield.

Nuances:

• Ava's text specifies to play the hidden card "here" which refers to the current battlefield where Ava is located
• This may be a case where the intended design (RAI) is clear even if the strict rules as written (RAW) might suggest otherwise
• The designers have indicated they want intention to trump rules and will adjust rules later if needed