AI Overview: Mirror in Clash Royale copies the last card you played for one more elixir. It is an Epic spell that unlocks in Arena 15 and its best printed deck wins 47.8% over 1,300 battles. This guide covers the cost, five common pairs, four rules for using it, and the one simple exploit that beats it every time.
Last Updated: October 2026
Key Points:
- Mirror costs the last card plus 1. It unlocks in Arena 15 (Miner’s Mine) and is not in your starting hand.
- No printed Mirror list wins 48% or more. The best wins 47.8% over 1,300 battles.
- Weakness: it only copies the last card played, so a cheap cycle card ruins the plan.
- Five pairs: Goblin Barrel, Bats or Skeleton Army, Valkyrie, spawners, damage spells.
How Mirror Works and What It Costs
Here’s the thing: Mirror places a copy of the card you just played. Two Hog Riders, two Skeleton Armies, two of anything. The price is the copied card’s cost plus 1. Copy a Hog Rider (4) and Mirror costs 5. Copy an Ice Spirit (1) and it costs 2.
| Last card played | Cost | Mirror cost | Total for two |
| Bats | 2 | 3 | 5 |
| Goblin Barrel | 3 | 4 | 7 |
| Skeleton Army | 3 | 4 | 7 |
| Valkyrie | 4 | 5 | 9 |
| Furnace | 4 | 5 | 9 |
| Fireball | 4 | 5 | 9 |
| Three Musketeers | 9 | 10 | 19 |
The hidden price: that extra elixir is 2.8 seconds of regeneration in single elixir and 1.4 seconds in double. It sounds small, but Mirror makes negative trades often, since it is already expensive. Current data agrees: its best deck wins 47.8% over 1,300 battles, and no printed list wins 48% or more.
Treat that as old, because the level system has changed. Mirror unlocks in Miner’s Mine (Arena 15) and cannot be in the starting hand, with no 2026 balance change.
For where Mirror fits among all spells, see the Mirror card guide. The pairs below link to their own pages, such as the Goblin Barrel guide and the Furnace guide.
Mirror sits at the bottom of the printed win rates, so a small buff could swing a lot of decks. The negative effect: if Supercell buffs it, a wave of players may copy the first Mirror deck they see, and the meta could fill with a card that is easy to exploit.
Five Pairs and Four Rules
1. Goblin Barrel. Cheap with few counters, so a Mirrored Barrel is the most common pairing. The card’s best deck wins 65.4% over about 1,500 battles. 2. Bats or Skeleton Army. Mirror undoes Zap or Giant Snowball on a swarm, but Poison hard-counters this plan. Skeleton Army’s Evolution lists reach 65.1%.
3. Valkyrie. One cleans a push. Two clean anything. But every printed base Valkyrie list is 47.8% or less. 4. Spawners. Furnace is the best case: expensive to double, but the rival must deal with two. Furnace’s best list wins 72.1% over 1,100 battles. 5. Damage spells. Fireball twice can nuke a push or finish a tower, and it works at any cost.
- Use Mirror as a backup or a counter. Replace what was destroyed, or destroy what was replaced. Do not expect to use it every match.
- Wait for a lead. Risky plays, like Mirroring a win condition, are for when you are already ahead.
- Have 3 cards that synergize. Spell-prone units, strong counters, strong counter-pushers, and cheap win conditions all work.
A picture of the problem: if Mirror sits in your hand and you have 2 elixir with a hand of expensive cards, a Hog Rider at the bridge can land five hits before you can play anything. That is the cost of a heavy deck with a +1 spell.
Evolutions make the copied card even more valuable, since a copy of an Evolution can double a special ability. The negative effect: if a copy mechanic ever works with Evolutions, one Mirror could swing a match, and players would face a very hard card to balance.
The Exploit and How to Beat Mirror
Abuse the rule. Mirror copies only the last card played. So make the rival play a different card first. If they hold Mirror for a Mini P.E.K.K.A against your Hog Rider, send a Skeleton Army at the bridge. They answer it with The Log, and now Mirror is set to The Log. Your Hog Rider walks in free.
Cycle cards and tanks work the same way. A fast cycle deck, or a bait deck with a Knight, can force the rival to play something else before the card that matters. Against knowledgeable players this exploit will be used a lot at high trophies.
- Pressure both lanes when the rival uses Mirror as a backup. If they defend one lane, the other takes damage.
- Do not give an elixir lead. A rival with a lead can cash it in with an offensive Mirror.
- Do not Mirror what the rival can punish. If you are the one with Mirror, avoid running into the exploit.
A final note: the same logic helps against any copy effect. The Clone Spell is the other duplication card, and the Clone Spell guide shows how clones differ from Mirror copies. For general pairing ideas, see the synergies guide.
If the community learns the exploit well, Mirror may become a trap card. The negative effect: players who build around it may keep losing to the same trick until they drop the card.
Frequently Asked Questions
How much does Mirror cost in Clash Royale?
The last card played plus 1 elixir.
Where does Mirror unlock?
Arena 15, Miner’s Mine.
Is Mirror a good card?
Its best printed deck wins 47.8% over 1,300 battles, and no printed list wins 48% or more.
What is the best card to Mirror?
How do you counter Mirror?
Make the rival play a different card before your key card, so Mirror copies the wrong one.
Sources
Researched from the following (no links, listed for transparency):
- CryptoAIMeta card guides for these cards, built from RoyaleTracker October 2026 samples and SeeMeta 2026 balance changes
- SeeMeta, Clash Royale balance changes 2026 (page updated October 2026), read through search summaries
- Supercell official Clash Royale API, card list (elixir cost, rarity, unlock arena)