Mirror

"Mirrors your last card played for +1 Elixir"

Summary

 * This card is unlockable from the Spell Valley (Arena 5).
 * The level of the copied card depends of the level of the Mirror (if the Mirror is level 5, the copied card's level will be level 5).
 * When in-game, the card will display your last placed card inside the Mirror.
 * This does not apply if you have not deployed a troop yet - instead it will display a question mark.

Strategy

 * The Mirror makes the player able to repeat a powerful card like the Goblin Barrel, leaving the opponent without Elixir to counter it.

Trivia

 * On 2/2/16, the February Update increased the Mirror's level of mirrored common cards by 4 and mirrored rare cards by 2.
 * The Mirror spell is the only card that doesn't has a defined Elixir cost.