Can Vex, Apathetic stun Reflection tokens from LeBlanc and Sprite tokens when they enter the battlefield?

Ruling: Yes, Vex, Apathetic can stun Reflection tokens and Sprite tokens because the card effects that create them explicitly use the word "play" (e.g., "play a ready reflection token" or "play a Sprite token"), which satisfies Vex's trigger condition of "when an opponent plays a unit."

Nuances:

• Tokens are only stunnable by Vex, Apathetic if the effect creating them uses the word "play" in its text
• Tokens that are simply "created" or "put onto the battlefield" without the word "play" would not trigger Vex, Apathetic's ability
• The distinction between "playing" and "creating" tokens depends on the specific wording of the card effect that generates them