"The Aether tower was particularly tricky to design, as Aether's definitions don't allow for much of a 'physical' item. As such, I went with this current form - while it looks almost polygonal, a closer look shows that the angles make no sense, and they're meant to look out of 'phase'; shifting around reality. Meanwhile, the sparks around it show the heavy electrical influence this element has. All in all, the Aether tower has worked out pretty well!" -vrt
Pillars are the staple of basic quanta generation in game; they are free to play (they require no quanta to place onto the field), and are considered to be the practical backbone of almost every deck in game.
Because of the requirements to play the various creatures, spells, and non-pillar/pendulum permanents in-game, pillars (and their upgraded form, towers) are essential for any player to generate a steady flow of quanta. Also, pillars are one of the few single-card permanents to create a stack upon being played (pendulums being the other permanent to stack on cards similar to itself). While this saves space on the permanent field, certain cards (Earthquake) can demolish the stacks of pillars very quickly as a form of quanta denial, so one should be careful about how and/or when they play these free cards when fighting certain opponents.