Armor: Concrete
Power: -100
Cost: $1500
Purpose: Technology advancement
Requires: Power Plant, Tiberium Refinery
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Support Power 1: Expander Airdrop
Recharge Time: 6 min
Powered: yes
Cost: $1200
Purpose: Expansion

Paradrops an Expander at the target location which can then be permanently deployed into a Command Post, granting area control around it where structures can be constructed. It also functions as a sensor array and auxiliary radar, detecting any cloaked units around it and maintaining the radar minimap so long as there is sufficient power.
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Support Power 2: Assault Tunnel
Recharge Time: 6 min
Powered: yes
Cost: $800
Purpose: Transport

Constructs an Assault Tunnel at the target location which can be occupied by up to eight small and medium sized units. They can then reemerge from any other tunnels or, if playing as the Wasteland Scavengers, Scrapyards. Assault tunnels can only be deployed within ten cells of a Construction Yard (and it's faction equivalents) or a Command Post.
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The Relay Center functions as a standalone expansion of the Communications Array, using enhanced intel gathering to accurately pinpoint locations on the battlefield to airdrop Expanders at and excavate Assault Tunnels near known friendly territories. It also unlocks far more advanced weapons and technology, barring those unique to the clans.

Notes:
-Original shp by Holy_Master