there will be a legend quest and a legend NPC press the button to talk with him and warp to world
the npc said when you press the purple button:
1.hello! i am the legend of pixelians
2.you can come to my world
3.i give you a really hard quest and get the prize!
4. good luck!
and there warp to world button
you need to give the npc some items until reach quest 80 when you give the npc it also give a random item (give npc dolphin you got 2 platinum locks) there is 80 quest
main prize: wings of legend pixelians
triple jump it also gives more light in mine, 5 bonus armor, every elemental resistance 10
the npc world have clouds (and unobtainable orb) so like you flying in the clouds
if you fell from the clouds there probally a forest with nothing just respawn
the npc is at the top left place of the world you need complete the parkour to do the quest
its okay if it bad i been thinking almost whole day