Reach player level 23 to unlock 21 new features in Castle Defense.
At 70% HP this boss activates a mirror shield reflecting 30% of all damage back to attackers — it can kill your own units! Only SIEGE and ARTILLERY units bypass the shield entirely. Switch to siege weapons to safely deal damage and shatter the shield for +45G!
Where: Fight ▸ Mirror Shield
This cursed champion heals 5% of its max HP every time one of your allies dies near it! Deploy your Priest unit to interrupt and block each heal for +30G. Without a Priest, healing stacks and becomes unstoppable — never fight this boss without one!
Where: Fight ▸ Dark Paladin
Bone Dragons regenerate 8 HP per second and become damage-resistant at 50% HP — standard damage barely dents them in the second half! Your Dragon Slayer units deal amplified damage that bypasses bone resistance, earning +30G per kill. Three sizes of dragon await: Wyvern, Drake, and Leviathan!
Where: Fight ▸ Bone Dragons
Terror Hawks bypass all ground defenses! Only Anti-Air Ballista towers can shoot them down for +22G. 3 variants from Harpy Scout to Dread Raptor.
Where: Fight ▸ Terror Hawks
Abyss Crawlers briefly phase through solid obstacles taking zero damage! Void Bane units track their phase signature and lock them down. 3 variants from Rift Creep to Abyssal Horror. +23G/kill.
Where: Fight ▸ Abyss Crawlers
Frost Crawlers envelop towers in ice cocoons, preventing them from attacking! Fire Bomb units melt the cocoon and score bonus kills. 3 variants from Frost Grub to Glacial Horror.
Where: Fight ▸ Frost Crawlers
Piranha Swarms latch onto and devour slowed units, amplifying all damage taken! Shockwave Tower disperses the swarm and earns bonus kills. 3 variants up to King Piranha.
Where: Fight ▸ Piranha Swarms
Their fear aura silences every tower they run past, disabling special abilities! Light Wards banish them instantly. 3 variants (Shadow Pup → Dread Hellhound). +21G/kill.
Where: Fight ▸ Nightmare Hounds
Drifting sand spirits blind every tower they pass through, temporarily disabling attacks! Water Cannon solidifies and destroys them. 3 variants. +21G/kill.
Where: Fight ▸ Sand Wraiths
Aerial Ember Drakes ignore all ground-based defences. Frost Arrows are the counter — aerial-capable towers only. 3 sizes up to Inferno Wyvern (440HP). +19G/kill.
Where: Fight ▸ Ember Drakes
Each pass drains tower HP — they are ethereal and immune to normal projectiles. Silver Arrows are the only material that can harm them. +20G/kill.
Where: Fight ▸ Blood Wraiths
These wraiths ignore the first 3 towers entirely — plan your defenses for their entry point. Anchor Spike removes their phase ability. 3 variants. +22G/kill.
Where: Fight ▸ Phase Wraiths
Lava armor makes these brutes completely fire-resistant — swap to Ice Spear units to shatter their plating and deal full damage. 3 variants. +21G/kill.
Where: Fight ▸ Magma Brutes
Heavy undead warriors emit a corruption aura cutting nearby tower damage by 30%. Purity Lance units pierce the aura restoring full tower output. +13G/kill.
Where: Fight ▸ Corrupted Knights
These ghostly serpents can phase through two towers ignoring their damage and drain 15% tower mana on each pass. Soul Anchor units lock them into the physical plane. +12G/kill.
Where: Fight ▸ Spectral Serpents
These shapeshifters disguise themselves as your own units, making tower targeting go haywire. Reveal Beacon units instantly expose all mimics on screen. +14G/kill.
Where: Fight ▸ Shadow Mimics
These black hole creatures eat any projectile dealing under 30 damage — smaller towers become useless against them. Upgrade to High-Caliber Cannon to punch through. +13G/kill.
Where: Fight ▸ Void Eaters
When burst, these fungal pods release toxic clouds that cut tower vision range by 50% for 5s. Ventilator units automatically disperse clouds — essential at higher rounds. +11G/kill.
Where: Fight ▸ Spore Clusters
Each wraith killed expands into a blinding mist cloud that blocks tower line-of-sight for 7s. Wind Bell units disperse the mist instantly — keep at least one active at all times. +12G/kill.
Where: Fight ▸ Fog Wraiths
Steel Colossi reflect 25% melee damage back at your units — melee-heavy decks take heavy chip damage. Explosive Charge units detonate them safely from range. +22G/kill.
Where: Fight ▸ Steel Colossi
Storm Callers summon a serpent every 11s — its bite chains lightning to 4 enemies dealing 50 damage each. +15G/kill.
Where: Build ▸ Storm Serpent