Skyblock
Your island, friends, upgrades and build contests
/island create makes your island and /island home takes you back. /island invite <player> builds with friends; /island upgrades grows it. /island visit <player> looks at someone else's.
Build contests
/contest shows the theme. Build it, stand on your island and /contest enter. When voting opens, /contest vote takes you to an entry: look around, then give it 1 to 5 stars. The best average wins. /contest results shows the winners.
Quests and the island shop
/quests opens Skyblock's quests: island farming, generator mining, mob farming, woodcutting, building, animals, villager trading, crafting, smelting, fishing and hand-ins. Daily and weekly quests change every day and week.
/shop opens the Island Trader: island essentials (dirt, sand, saplings, seeds, lava and water) from the start, and more as your island grows: farm machines at island level 3, tools and generator ores at 5, potions at 10, enchanted books at 15, mob-farm spawners at 20. Produce and ores sell back well (cobblestone hardly at all), up to 15,000 coins a day. The token shop is behind Network shops (/shop network).