Can you Mirror Image a sprite token?

Yes, you can target a Sprite token with Mirror Image.

According to Rule 182.1.d, a Sprite token is a unit. Since Mirror Image instructs you to "Choose a unit," a Sprite token is a valid target for the spell.

When the resulting Reflection token resolves, it will become a copy of that Sprite token. As established by the definition of copy effects (see the Patch Notes 2026-03-30 and RiftJudge FAQ #10200), the Reflection will adopt the target's copyable traits, including its printed Might and rules text.

Additionally, because the Mirror Image spell explicitly grants the Reflection token the Temporary keyword, it will be killed at the start of your Beginning Phase, just like the original Sprite token would have been.