Supermassive (10 player)

What an age with live in when a Philosopher's Stone is a direct reference to an anime and a Supermassive Black Hole is a reference to a song. [Holy Grail] Held in off-hand +90 intellect +50 stamina +70 spirit +120 spell power "This is a reference to the Spielberg film "Indiana Jones and the Last Crusade", where Indiana Jones searches for a goblet known as the Holy Grail. I wonder if we'll ever see a Ragnarok reference from Final Fantasy, though."

Soloed this achievement today as a prot pally, in SoO gear, 567 iLvl.
Seems the tooltip on of the achievement isn't accurate. Says you need to defeat Algalon after closing 3 black holes. Managed to get the achievement as soon as the third hole was closed. After that I phased out with 5 stacks, the boss reset and I walked away. I've recorded the kill

Try to get 2 Collapsing Stars as close to eachother as possible and a third relatively close. Stand next to the double black holes and wait for the Living Constellations to come to you. Once you have 4 stacks of Phase Punch they'll come to you. Kite 2 directly into the 2 black holes you're standing next to. Then sprint to the last black hole.

May take some practice and luck, but the Constellation should hit that last black hole before you gain a 5th stack of Phase Punch.

Remember to not stand inside a Black Hole, or you'll be teleported to the shadow realm and Algalon will reset!

Good luck!

EDIT: As a comment on the video explained, and it's proven to be true, the achievement requires you to close 3 black holes in under 10 seconds, AND to kill Algalon. That can both be done seperately. You don't actually have to do it all in once. Kill him this week, and come back next week to close the black holes in the way explained above and seen in the video and you'll get the achievement, if you're interested in solo-ing it.
Goes for both the 10- and 25-man Supermassive achievements.

Which in itself is a reference to supermassive black holes in reality, which, according to some, hold galaxies together.