Added
New building - Relay Tower (Duplicates magic 0.2x, creates an energy barrier ~45 sec)

New perks in the tree “Magic”:
"Recharge" - Accelerates barrier recharging (-1 sec per level)
“Barrier HP” - Energy barrier base HP (~30 + 3 hp per level)
“Energy Density” - Additional barrier protection (+5 defense per level). “Relay Tower HP” - Relay Tower base HP (~30 + 1 hp per level)
“Reinforced Relay” - Additional Relay Tower protection (+3 defense per level).
The Core is protected by an energy barrier (disposable)
The Observation Station is protected by an energy barrier (rechargeable ~45 sec)

New items:
Old Battery (Energy barrier recharge time -10 sec)
Fireflies in a jar (Two magical fireflies appear at the core)
Bucket for Mana (Max. mana +250)
Distillation Cube (Mana regeneration rate +1.5)
Scroll of Strength (Magic arrow damage x1.5)

Changed

Reduced cost of upgrades (easy experience )
Maximum level for perk “Basic Tower Attack” 25 -> 50
Maximum level for perk “Advanced Tower Attack” 30 -> 50