Does opponent plays Mirror Image, I bounce the chosen unit back to hand. Does Mirror Image still activate with copied unit?
When your opponent plays Mirror Image and you return the chosen unit to their hand, Mirror Image still resolves, but the resulting Reflection token will not successfully copy the unit.
1. Chain and Targeting
When your opponent plays Mirror Image, it is placed on the chain, and they must choose a target unit. If you respond by playing a spell or ability to bounce that unit to their hand before Mirror Image resolves, the target is removed from the board.
2. Resolution Sequence
According to Rule 359.3.e.6 and Rule 359.3.e.7, instructions that cannot be followed due to missing targets are ignored.
- Mirror Image resolves.
- The instruction "Play a ready Reflection unit token to your base" is executed. A 0 Might Reflection token enters play at your opponent's base.
- The instruction "It becomes a copy of that unit" attempts to execute. Because the original unit is no longer on the board, the instruction fails to find a valid target and is ignored.
- The final instruction "Give it [Temporary]" is executed.
3. Resulting Token
The Reflection token remains on the board as a 0 Might unit with the [Temporary] keyword. Because the copy effect failed, it does not inherit any other traits, stats, or rules text from the original unit. Because it was given [Temporary], it will still be killed at the start of your opponent's next Beginning Phase (as per Rule 816.1.b).
Note: I could not fully verify the specific text of the Mirror Image card or the resulting token's keywords against the retrieved rules.