In Clash of Clans, players can construct two new defensive constructions,

he first of which is the Spell Tower. Because players can pick the spell the Spell Tower casts while protecting the base, it is special.

The Rage spell can be thrown by the Spell Tower at Level 1 to increase 

the movement speed and damage of adjacent friendly troops and heroes.

The Poison Spell, which the Spell Tower directs towards nearby enemies to

restrict their movement and attack speeds while doing damage over time 

when they're in the toxic cloud, is unlocked after levelling up to Level 2.

At Level 3, the Spell Tower can also cast Invisibility, briefly hiding adjacent defensive structures and units.

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