Free the Green Sage
Set Me Free Already!
It is also related to a trophy titled Set Me Free Already!, completing this mission will reward you with a bronze trophy.
Once you have rescued all three sages, a short cinematic will show a series of platforms allowing you access to the uppermost area of Gol and Maia's Citadel.
These platforms are deceptively difficult and can pose a great obstacle if not treated with respect. The best way to ensure no falls is to stand on the frontmost edge, and do a high-jump (Note: this is not the same as a double jump). This should enable Jak to grab the edge of the next platform up.
After you have climbed the series of hovering platforms, you will reach a small climb crammed with the fragmented circles typical in the Citadel. Make sure you know what is above you when traversing these and they should not pose a huge threat.
After this precarious ascension, you must turn and prepare to board the Carousel. This section of the mission involves careful jumping between platform after spinning platform, take your time here as there are no side boundaries and it is a long way down.
At last, you will reach a thin wooden walkway and you may pick up the last Precursor Orbs in the game before you may smash the final imprisoning bulb; collect your hard-earned, final Power Cell and, having rescued Samos at last, make your way up the monumental elevator to face the equally enormous Robot on the Dark Eco Silo above.