Psi

From StarCraft Wiki

Psi is a value that determines how Protoss units may be constructed in-game.

[edit] StarCraft

In StarCraft, there is a limit of 200 psi points. The Dark Archon mind control ability can result in the amount of used psi, or control or supply, exceeding the 200 point limit. While legal, this means no further units can be constructed until the used total falls back below 200.

Generation Table

	Building/Unit
9	Nexus
8	Pylon

Consumption Table

	Building/Unit
1	Probe · Observer
2	Zealot · Dragoon · High Templar · Dark Templar · Shuttle · Corsair
3	Scout
4	Reaver · Archon · Dark Archon · Arbiter
6	Carrier

[edit] StarCraft II

Generation Table

	Building/Unit
10	Nexus
8	Pylon

Consumption Table

	Building/Unit
1	Probe · Observer
2	Zealot · Stalker · High Templar · Dark Templar · Warp Prism · Void Ray · Nullifier · Phoenix
4	Immortal · Archon
6	Carrier · Colossus
8	Mothership