Danke! I had a hard time reading the text on those pages and thus transcribed its effects into a spoiler section.
LINKED POWER [METAPSIONIC][spoiler]
Source: Complete Psionic 62
Benefit: To use this feat, you must expend your psionic focus.
Manifesting a Linked power means that you choose 2 powers and pay the cost of each this round. One power you manifest this round and the other is automatically manifested next round with no action required and no additional power point cost.
The power that manifests next round (the Linked power) automatically targets the same area or target(s) as the power you manifest this round. If this round's power has no target or area, choose an area or target(s) for the Linked power next round as permitted by the Linked power's description.
A Linked power grants its normal saving throws and power resistance as appropriate for each power.
Sometimes, Linked powers are redundant. Hitting the same target with a psionic dominate on two consecutive rounds requires the target to save twice. Otherwise, this double psionic dominate acts as a single power.
By the time the second power manifests, there may be no legal targets or area. If this is so, the power manifests but to no effect. Even if this power has no effect, you can still act as normal on this turn.
Using Linked Power requires you pay the power point cost of both powers on this first round. For example, if you manifest hustle (5PP as an Egoist) and synchronicity (1PP), you must pay 6PP this first round.[/spoiler]
Concerns
I was hoping to use this to fast summon an astral construct horde. Would this work?
How would this strategy work with synchronicity? Seemingly, I manifest something cheap on myself like force screen then link it to synchronicity, thereby getting myself an extra standard action next round.
Via Linked Power, how could I combine astral construct and synchronicity to give my construct an extra action next round?