There are 5 initial Island Quests these are: Beginner, Intermediate, Experienced, Master and Grandmaster.
Each tier has a set of challenges you can complete for rewards. As you finish one tier, you unlock the next and an Island size upgrade. From completing the initial quests you can gain up to a 325x325 block island, minions, and more!
There are an additional 5 Island Quests: Insane, Epic, Prestigious, Legendary, Godly. These quest are significantly more difficult than the last. Completing these will give you an expansion where you can gain up to a 525x525 block Island.
There are also weekly quests to harvest large amounts of a certain crop that you can do to receive a huge mana reward.
Here are the island size upgrades you get by completing each tier of first page of challenges:
Here is a list of the quests and their rewards:
Requirement: Harvest and hand in 64 wheat
Reward: 1 Diamond Hoe and 250 Mana
Requirement: Chop and turn in 64 oak logs
Reward: 1 Diamond Axe and 250 Mana
Requirement: Mine 300 cobblestone
Reward: 1 Diamond Pickaxe and 250 Mana
Requirement: Catch 20 fish
Reward: 1 Fishing Rod [Luck of the Sea 2, Lure 2] and 250 Mana
Requirement: Craft a set of iron armor and a set of iron tools
Reward: 1 Anvil and 250 Mana
Requirement: Harvest 200 sugar cane
Reward: 16 mycelium and 600 Mana
Requirement: Harvest 200 potatoes
Reward: 1 Ocelot Egg, 1 Nametag, and 600 Mana
Requirement: Claim 15 Daily Rewards
Reward: 2 Villager Eggs and 600 Mana
Requirement: Enchant 10 Items
Reward: 64 Lapis and 600 Mana
Requirement: Craft a set of diamond armor and a set of diamond tools
Reward: 2 Mending Books and 600 Mana
Requirement: Place a spawner
Reward: 12 Hoppers and 1,250 Mana
Requirement: Slay 250 Mana Wolves
Reward:3 Creeper Spawners and 1,250 Mana
Requirement: Harvest 10,000 Resources in Wolfhaven
Reward: 1,250 Mana and 10,000 Use Harvester Hoe
Requirement: Reach island level 25
Reward: 1 Ancient Chest Key and 1,250 Mana
Requirement: Harvest 250 of the following crops: Wheat, Sugar cane, Pumpkin, Melon, Potato, Beetroot, Carrot, Bamboo
Reward: 1 Farming Boots and 2,000 Mana
Requirement: Kill 5,000 mobs
Reward: 1 Zombie Pigman and 2,000 Mana
Requirement: Catch 50 items from the Mana Pond
Reward: 1 Rare Enchantment Book and 2,000 Mana
Requirement: Participate in killing of 2 Bosses
Reward: 3 100% Black Scrolls and 2,000 Mana
Requirement: Reach 50 Island Level
Reward: 2 Teleport Pads and 2,000 Mana
Requirement: Complete all quest on this tier
Reward: 1 Minion
Requirement: Harvest 10,000 Sugarcane
Reward: Holy White Scroll and 6,000 Mana
Requirement: Break 50,000 blocks
Reward: 1 Trench Pickaxe and 6,000 Mana
Requirement: Kill 10,000 Morend Monsters
Reward: 10,000 use Sell Wand, 1 Villager Spawner, and 6,000 Mana
Requirement: Complete one Challenge
Reward: 3 Chunk Hoppers, 1 Mooshroom Spawner, and 6,000 Mana
Requirement: Reach 125 Island Level
Reward: 1 Iron Golem and 6,000 Mana
Requirement: Complete all quest on this tier
Reward: 1 Minion
Here are the island size upgrades you get by completing each tier of second page of challenges:
Requirement: 10,000 Crops
Reward: 10,000 Mana and Farming Talisman
Requirement: Kill 25 Mini Bosses
Reward: 10,000 Mana, 5 Legendary CE, and 5 Spawner Packages
Requirement:Slay 2,500 Sandara Serpents, 2,000 Sandara Kangaroos, 1,500 Sandara Mummies
Reward: 10,000 Mana, 10 Magic Cookies, and 5 White Scrolls
Requirement: Slay 2,500 Tangleroots Tigers, 2,000 Tangleroots Gorillas, 1,000 Tangleroots Rhinos
Reward: 10,000 Mana and 3,500 Souls
Requirement: Reach island level 200
Reward: 10,000 Mana and 1 Legendary Key
Requirement: Complete all quest on this tier
Reward: 1 Golden Knight, Cursed Witch and Hellhound Boss Spawn Egg
Requirement: Harvest 50,000 Wolfhaven Resources
Reward: 12,500 Mana and 5 Chunk Hoppers
Requirement: Catch 100 pond drops
Reward: 12,500 Mana, Fish Talisman, and 2 Large XP Pouches
Requirement: Enchant 150 Items
Reward: 12,500 Mana and 25 Adamant Ingot
Requirement: Slay 2,500 Icehaven Kryknas and 750 Icehaven Yetis
Reward: 12,500 Mana, 350 Souls, and 10 Iron Golem Spawners
Requirement: Reach island level 250
Reward: 12,500 Mana, 1 Ancient Key, and 5 2x Mob Head Boosters (10min)
Requirement: Complete all quest on this tier
Reward: 2 Golden Knight Boss Spawn Egg, 1 Hellhound and Yeti Boss Spawn Egg
Requirement: Complete 250 Tasks
Reward: 30,000 Mana, 10 Task Crates, Guardian Boots
Requirement: Slay 750 Tigers
Reward: 15,000 Mana, 350 Souls, 5 Legendary CE Books, and 1 Sell Wand (5k Uses, 130% Boost)
Requirement: Mine 100,000 Blocks
Reward: 15,000 Mana, 1 Autocraft Chest, and Prestigious Pickaxe
Requirement: Catch 500 Fish
Reward: 15,000 Mana, 5 Rare CE Books, and River Monster Rod
Requirement: Reach island level 350
Reward: 15,000 Mana, 2 Ancient Key, and 5 15min McMMO Boosters (125%)
Requirement: Complete all quest on this tier
Reward: 2 Cursed Witch Boss Spawn Egg, 1 Hellhound, Yeti and Krykna Boss Spawn Egg
Requirement: Harvest 5,000 Wheat, Sugarcane, Pumpkins, Melons, Potatoes, and Carrots
Reward: 20,000 Mana, 2 Black Scrolls, and Harvester Hoe (2k Uses, 120%)
Requirement: Kill 50 Mini Bosses
Reward: 20,000 Mana, Soul Talisman, and Buildwand (10k Uses)
Requirement: Slay 25,000 Wolfhaven Monsters
Reward: 20,000 Mana, 5,000, and 2 Holy Scrolls
Requirement: Participate in killing of 50 Bosses
Reward: 20,000 Mana, 10 Villager Spawners, and 1 Infinity Chest
Requirement: Reach island level 400
Reward: 20,000 Mana, 1 Mythical Key, 2 Ancient Key, and 2 2x Mob Head Boosters (10min)
Requirement: Complete all quest on this tier
Reward: 1 Cursed Witch, Golden Knight, Hellhound, Yeti, Krykna and Sahuagin Boss Spawn Egg
Requirement: Harvest 500,000 World Resources
Reward: 30,000 Mana, 10 Magic Cookies, and Guardian Helmet
Requirement: Harvest 10 Million Crops
Reward: 30,000 Mana, 10 Spawner Packages, 3 Pots of Gold, and Guardian Chestplate
Requirement: Kill 100,000 World Monsters
Reward: 30,000 Mana, 1,500 Souls, 5 100% Success Dust, and Guardian Leggings
Requirement: Complete 250 Task
Reward: 30,000 Mana, 10 Task Crate, and Guardian Boots
Requirement: Reach island level 500
Reward: 30,000 Mana, 1 Mythical Key, 2 Legendary Keys, and Guardian Axe
Requirement: Complete all quest on this tier
Reward: 2 Mechadino Boss Spawn Egg, Guardian Sword, and Guardian Pickaxe
Requirement: Harvest 10,000 Carrots
Reward: 3,000 Mana
Requirement: Harvest 10,000 Potatoes
Reward: 3,000 Mana
Requirement: Harvest 10,000 Wheat
Reward: 3,000 Mana
Requirement: Harvest 10,000 Netherwart
Reward: 3,000 Mana
Requirement: Harvest 10,000 Pumpkins
Reward: 3,000 Mana
Requirement: Harvest 10,000 Melons
Reward: 3,000 Mana
Requirement: Harvest 10,000 Sweet Berries
Reward: 3,000 Mana
Requirement: Harvest 10,000 Bamboo
Reward: 3,000 Mana
Requirement: Kill 25,000 Mobs
Reward: 3,000 Mana and $500,000
Requirement: Kill 1,000 World Monsters
Reward: 3,000 Mana and $500,000
Requirement: Catch 150 Fish
Reward: 3,000 Mana and $500,000
Requirement: Complete 25 Tasks
Reward: 3,000 Mana and $500,000