Why i got 9900000 exp after i use elixer mytstone?
theres feats that award for using crystals and mythstones
look in the Codex under Feats. there are a lot of them that get completed as you adventure in the PVE world. you get Hero Experience based on your level and Rewards when you complete a Feat. the Accomplished Perk lowers the requirements to finish the Feats by 25% (rounded up) and also gives a +5 pick up radius.