The Solrot fragments is used in conjunction with Solrot's greatsword T5, Solrot's crossbow T5 and/or Solrot's staff T5 to create AoE Crystals. When extracting a Solrot fragments from your T5 Solrot armor. you will get 1 Solrot fragments and your set back, but in a degraded state. That way we can make 1 AoE crystal for a specific style at a time, without losing AoE in our other 2 styles. The degraded armor will keep all of it's stats, so no need to hesitate when extracting Solrot fragments to upgrade your Temple of Trials armor set. (You will lose your Solrot armor after the 3rd extraction).