kill @s
summon firework_rocket ~ ~ ~ {Life:0,LifeTime:0,FireworksItem:{id:"minecraft:firework_rocket",count:1,components:{"minecraft:fireworks":{explosions:[{shape:"star",has_twinkle:true,colors:[I;16757504],fade_colors:[I;16252672]}]}}}}

summon item ~ ~1 ~ {Silent:1b,Glowing:0b,CustomNameVisible:1b,PickupDelay:32767,Invulnerable:1b,Motion:[0.0,0.5,0.0],Tags:["artifact","tutorial_item"],CustomName:'{"bold":true,"color":"gold","text":"Energy Core"}',Item:{id:"minecraft:heart_of_the_sea",count:1,components:{"minecraft:custom_data":{id:1}}}}