What Is Hydra?
Hydra is an air attack strategy combining Electro Dragons and Lava Hounds with Lightning Spells to 3-star TH12–14 bases. The name comes from the mythological multi-headed creature — the army hits from multiple fronts simultaneously and is difficult to shut down with any single defensive response.
Hydra is one of the highest-DPS air strategies in the game. A properly set up Hydra clears Air Defenses with Lightning before the main army even lands, then floods the base with chains of Electro Dragon lightning and Lava Hound air protection.
How Hydra Works
Lightning Spell Air Defense Removal
Before deploying any troops, Hydra uses multiple Lightning Spells to destroy Air Defenses outright. At TH12:
- 4 Lightning Spells + 1 Earthquake Spell destroys one Air Defense
- With 8 Lightning Spells, you can eliminate 2 Air Defenses before troop deployment
At TH13–14, higher-level Air Defenses require the full Lightning + Earthquake combo, but the principle is identical: remove Air Defenses before Dragons land so they face minimal anti-air fire.
Optimal Lightning target: The Air Defense that would be hardest for your army to reach naturally — usually the one deepest in the base or protected by a Tornado Trap zone.
Electro Dragon Chain Lightning
Electro Dragons don’t just target one building — their attacks chain to nearby structures. An EDrag in the center of a base can chain-lightning 6+ buildings simultaneously. At TH12, three EDrags working through a compartment can clear it in seconds.
Lava Hounds as Air Defense Tanks
Lava Hounds have the highest HP of any air troop and specifically target Air Defenses. Deploying Lava Hounds before Electro Dragons means the Hounds absorb Air Defense fire while EDrags chain-lightning everything else. When a Lava Hound dies, it spawns Lava Pups — small air units that continue targeting the Air Defense.
Spell Loadout Breakdown
The spell loadout is the most important decision in a Hydra attack:
Standard TH12 Hydra:
- Lightning × 6–8
- Earthquake × 2
- Rage × 1
- Haste × 1 or Freeze × 1
Why so many Lightning Spells: Hydra succeeds by eliminating Air Defenses before the army engages them. Trading 6–8 spell housing slots for 2 Air Defense destructions is worth it because each surviving Air Defense kills 1–2 full EDrags.
Earthquake + Lightning combo: 1 Earthquake reduces a building’s HP by 25% (regardless of HP), then Lightning Spells finish it. This is more efficient than using 5 Lightning Spells alone.
Troop Composition (TH12)
| Troop | Count |
|---|---|
| Electro Dragon | 5–6 |
| Lava Hound | 2 |
| Balloon | 8–10 |
| Minion | 6 |
Spells: Lightning × 6, Earthquake × 2, Rage × 1, Haste × 1
Clan Castle: Electro Dragon or high-level Dragon
Execution: Step by Step
Phase 1: Pre-Attack Scouting
Before dropping any troops, identify:
- All Air Defense locations — there are 5 at TH12. Choose 2 to eliminate with Lightning.
- Air Sweeper direction — always deploy your army behind the sweeper.
- Scattershot positions — the 2 Scattershots at TH12 are the anti-air threat. Plan your Rage spell for the Scattershot zone.
Phase 2: Lightning Setup
- Drop Earthquake + 4 Lightning on the first Air Defense. It should be destroyed.
- Drop Earthquake + 4 Lightning on the second target Air Defense.
- Verify both are destroyed before deploying troops.
Precision matters: Lightning Spells have a radius. Center them exactly on the Air Defense building. Being 1–2 tiles off reduces damage significantly.
Phase 3: Lava Hounds First
Deploy 2 Lava Hounds on the entry side — send them toward the remaining Air Defenses. They’ll aggro Air Defense fire immediately, protecting the EDrags behind them.
Phase 4: Electro Dragon Deployment
Fan 5–6 Electro Dragons across the full width of the entry side — 3–4 tiles apart. Do NOT stack them.
Why wide deployment: Stacked EDrags get hit by Scattershots as a cluster. Fanned EDrags cover more ground and each chain-lightning hits different buildings.
Phase 5: Balloons + Support
Deploy Balloons behind the EDrag line. Balloons target Air Defenses if any remain and clean up surviving defenses as EDrags pass through.
Grand Warden walks with the push. Save the Eternal Tome for the Eagle Artillery burst — do not use it for a Scattershot hit.
Phase 6: Rage Placement
When the EDrag front approaches the Eagle Artillery + Scattershot cluster (usually centered on the Town Hall area), drop the Rage Spell on them. Raged EDrags chain-lightning so fast the Eagle Artillery barely gets one burst before dying.
Phase 7: Minion Cleanup
Deploy Minions last to clean up outer buildings the main army bypassed.
Hydra at TH13 and TH14
At TH13–14, the Hydra composition requires more Lightning Spells because Air Defenses have higher HP. The core execution is identical but the pre-attack setup must eliminate more Air Defenses:
TH13: Remove 2–3 Air Defenses (3 Air Defenses at TH13 require 3 × [Earthquake + Lightning] combos = 9+ Lightning Spells)
TH14: Bring 9–10 Lightning + 3 Earthquake to remove 3 Air Defenses
At TH14, EDrag Zap (a faster variant of Hydra using more EDrags and fewer Balloons) is often preferred. The concept is the same — mass Lightning + EDrags — executed with a higher troop count.
Hydra vs. Other TH12 Strategies
| Strategy | 3-Star Rate | Execution Difficulty | Best Against |
|---|---|---|---|
| Hydra | High | Medium | Anti-ground bases |
| Yeti Smash | High | Medium | Anti-air bases |
| Super Witch | Medium-High | Low | General war bases |
| Queen Walk LaLoon | Very High | Hard | Well-designed bases |
Use Hydra when the war base is clearly designed to stop ground attacks (rings of X-Bows, dense compartments). The air approach bypasses all of it.
Common Hydra Mistakes
Off-center Lightning placement. Lightning Spells must be dropped exactly on the Air Defense center. Being 2 tiles off can mean the Air Defense survives at 10% HP — and that surviving Air Defense kills 2 EDrags during the main attack.
Deploying EDrags before Lava Hounds. Without Hounds absorbing Air Defense fire, the first two EDrags land and immediately take 3× Air Defense focus fire. They die in seconds. Lava Hounds must enter first.
Stacking EDrags. A column of EDrags in the Scattershot killzone loses 3 EDrags to one Scattershot burst. Fan them across the full base width.
Using Warden ability for Scattershot instead of Eagle Artillery. Scattershots hurt; the Eagle Artillery burst hurts more. Save the Eternal Tome for Eagle Artillery.
Not checking Air Sweeper direction. Deploying into the Air Sweeper face pushes EDrags backward, completely negating movement for 2–3 seconds per push. Always approach from behind the sweeper.
