The Mirror is an Epic card that is unlocked from the Miner's Mine (Arena 15). It is a spell that repeats the last card used by the player for 1 extra Elixir. It will never appear as 1 of the first 4 cards dealt to the player at the start of a battle, as the description states. The level of the copied card depends on the level of the Mirror. When in a battle, the card will display the player's last placed card inside the Mirror. A Mirror card does not have a defined Elixir cost; instead, it shows a "?". At the maximum level, the Mirror will place a card 1 level higher than the player's previous card's maximum level (Level 15).