Ready for Commitment Trophy in God of War Ragnarök

Upgrade all three pieces of one armour set (chest, wrists, waist) to level 9 at a shop. The pieces must carry the same set name: three maxed pieces from different sets do not count. Spend materials on that one set only. The highest levels need Purified and Sparkling Crystals: break the orange crystal rocks around Vanaheim's Crater for fragments and throw them into the Wishing Well in The Plains.