Like all solar transport energy blades, it has a square gem slot that multiplies the effect of the gem by ten. For example, placing a +400 elemental attack gem in the slot yields an elemental attack increase of 4,000 and will also change the color of the blade to match the element.
The Solar Trans-LX also has a light gem slot and a raw attack stat of 150. At 1,000,000, it is the most expensive light weapon in the game. It was added in the Skycages update.
In Infinity Blade III, the weapon has two square gem slots. The effect of the elemental attack gems is no longer multiplied by 10. Instead, the elemental damage is fixed which depending on the level of the weapon. The Solar- Trans-LX start with a base amplification of +1800, and increases by 300 per level, so inserting a rare +500 elemental attack gem into it gives 2300 fire damage (at level 6), plus the intrinsic 10 physical damage from the weapon itself. When both slots are occupied, the base amplification is cut down by half for each gem to compensate for the total base damage. The bonus is further increased if two gems of the same element are used.
The Solar Trans-LX costs 1,500,000, no longer the 1.000.000 in Infinity Blade II, making it the most expensive weapon in Infinity Blade III..
At one point in Infinity Blade II, there was a glitch involving this weapon in which the player would hold on the Solar Trans-LX while having equipped the Worn Axe, and you would gain 1,000,000, having sold nothing.