Based on Opening:
Cubes.
Drop rate of Challenge Rainbow cube:
Warp portal stones recipe (need to craft 4 to enter Unique Raid, lvl 330+) 21.09 %
edit: this should be instance multiply token Instance dungeon reset voucher 1.09 %
Silver anvil (cannot be traded) 2.00 %
1 Old enchantment card (cannot be traded) 1.64%
5x blessed shards 2.36 %
3x Hair costume enchant scrolls (cannot be traded) 2.36 %
1 Attribute point voucher for 500 points 2.18 %
1 Attribute point voucher for 1’000 points 0.18 %
3x Yellow Caro Antenna 2.73%
3x Green Charog Horn 4.91 %
3x Kugheri Lyoni Horn 4.18 %
3x Kugheri Zymbani’s Sword 5.64 %
3x Kugheri Zeffi’s Ornament 4.73 %
3x Yellow Leafnut Tail 6.18%
3x Mourningbird Tail 3.45 %
3x Namu’s Tail 4.91 %
1 Diamond 3.09 %
1 Sapphire 4.55 %
1 Ruby 4.18 %
1 Bloodstone 4.36 %
1 Obsidian 4.73 %
1 Peridot 4.00 %
1 Portium 5.45 %
I will add it to first post shortly.
Many thanks to Feedery from KR forum!