function survivalplus:tools/upgrade_effect
data modify entity @s Offers.Recipes append value {maxUses:1,buy:{id:emerald,count:30},sell:{id:echo_shard,components:{custom_data:{less_spawn:tag},item_name:{"text":"Calming Crystal","italic":false},lore:[{"text":"Decreases spawning of mobs","italic":false,"color":"gray"}],rarity:rare,enchantment_glint_override:1b}}}
tag @s add selllessspawn