/summon villager ~ ~2 ~ {VillagerData:{profession:librarian,level:5,type:plains},Offers:{Recipes:[{buy:{id:diamond,Count:12},buyB:{id:ender_pearl,Count:10},sell:{id:diamond_pickaxe,Count:1,tag:{display:{Name:"{\"text\":\"Crystal Pickaxe\",\"color\":\"blue\"}"},Enchantments:[{id:"minecraft:efficiency",lvl:8},
{id:"minecraft:fortune",lvl:3},{id:"minecraft:unbreaking",lvl:3}]},maxUses:9999999}}]}}