Fae fawn

Lillia, Fae Fawn is a 3-Might Mind Champion Unit (3 Energy) with Accelerate and Temporary, plus: "When I move from a location, play a 3 Might Sprite unit token with Temporary there."

A few things that come up most with her:

• The Sprite is created at the location she left, and the trigger "looks back" at that location even if she's long gone by resolution. Because her move trigger is pending on the chain, the turn is in a Closed State, so you do not lose control of a battlefield she just vacated — the Sprite lands there and holds it (FAQ 10369).
• She has Temporary herself, so she's killed at the start of your Beginning Phase, before scoring (Rule 816) — you only keep her across the opponent's turn. The Sprite she makes dies the same way.
• Accelerate is an optional additional cost of 1 + a Mind power paid as you play her; pay it and she enters ready instead of exhausted (Rule 805).

What's the actual interaction you're trying to sort out? Give me the board state and I'll rule on it directly.