Reach player level 28 to unlock 8 new features in Castle Defense.
Build the Siege Command Center to boost all towers; tier 3 unlocks Siege Storm.
Where: Fight ▸ Siege Cmd
Socket runes into hero ability slots for permanent stat boosts. Level runes from 1→5 using gems for increasingly powerful bonuses. Each hero has 2 slots.
Where: Heroes ▸ Runes
At 60% HP the Frost Colossus unleashes a devastating frost wave that FREEZES every deployed unit for 4 full seconds — leaving your castle completely defenseless! Fire Mage units generate heat auras that melt the frost before it reaches your troops, and earn +35G fire counter kills. Always field Fire Mages before this boss!
Where: Fight ▸ Frost Colossus
The Magma Overlord is never alone — every 20 seconds it summons a fresh wave of 3 magma minions that protect it! While even one minion lives the Overlord is immune to stuns. Kill all 3 minions in quick succession to stun the Overlord and deal massive bonus damage. Successfully stunning it earns +48G bonus gold. Prioritize the minions!
Where: Fight ▸ Magma Overlord
The Infernal Serpent breathes fire constantly — but at 65% HP it raises a solid fire barrier that blocks ALL projectiles for 6 whole seconds! Your entire offense goes offline unless you have Frost Cannon units ready. Frost shells crack the barrier early and each successful break earns +46G. Never fight the Serpent without frost units in reserve!
Where: Fight ▸ Infernal Serpent
The Titan Golem is already tough — but at 80% HP it grows a coat of living stone armor that DOUBLES its defense, making it nearly impervious to standard attacks! Your entire damage output gets cut in half until the armor is cracked. Hammer Knight units strike with enough force to crack stone armor, breaking through and earning +48G. Stack Hammer Knights before the armor phase to react instantly!
Where: Fight ▸ Titan Golem
Each hit on a tower drains 20 HP into the knight healing it. Holy Wardens negate the life-steal. +17G/kill.
Where: Fight ▸ Blood Knights
Unit Prism Burst