Orb of Horizons only roll maps into their NATURAL TIER

 

Usage example

You are missing completion of Dungeon Map. Your atlas is watchstoned so that your Dungeon is a Tier 16 Map. but you only want completion for the atlas bonus.

Search for ""Dungeon"" here (► Tier 9), so you have to take any (!) Tier 9 map from your stash and start using Orbs of Horizon on it until you eventually get the dungeon map.

Except if you are truly desperate and/or in SSF, do not use Horizon Orbs on T2, T3 and T4 maps, it's a waste of currency because there are so many of them

No unique maps in this list (cannot be rolled with horizon orb)"
 

T1

Arcade, Coves, Jungle Valley, Pen

T2

Arena, Crater, Defiled Cathedral, Fields, Frozen Cabins, Gardens, Grotto, Infested Valley, Lair, Moon Temple, Peninsula, Promenade, Spider Forest, Sunken City, Tower, Tropical Island, Underground River, Underground Sea, Volcano, Wharf

T3

Ancient City, Arid Lake, Ashen Wood, Basilica, Belfry, Canyon, Cemetery, Courtyard, Factory, Forking River, Geode, Glacier, Graveyard, Laboratory, Lava Chamber, Mud Geyser, Orchard, Overgrown Ruin, Pier, Plaza, Primordial Blocks, Reef, Shore, Strand, Sulphur Vents, Temple, Toxic Sewer, Vaal Pyramid

T4

Academy, Arsenal, Bone Crypt, Cage, Channel, Courthouse, Crimson Temple, Crystal Ore, Desert, Dunes, Iceberg, Leyline, Lookout, Marshes, Museum, Precinct, Primordial Pool, Ramparts, Wasteland

T5

Armoury, Atoll, Carcass, Cells, Chateau, Desert Spring, Haunted Mansion, Lighthouse, Palace, Shrine, Waste Pool, 

T6

Malformation, Silo

T7

Dark Forest, Waterways

T8

Alleyways, Dry Sea, Racecourse

T9

Dungeon, Mausoleum, Mineral Pools, Overgrown Shrine, Relic Chambers, Spider Lair, Stagnation

T10

Forbidden Woods, Ghetto, Phantasmagoria, Scriptorium

T11

Cold River, Conservatory, Flooded Mine, Fungal Hollow, Grave Trough, Ivory Temple, Port

T12

Coral Ruins, Crimson Township, Dig, Shipyard, Siege

T13

Cursed Crypt, Maze, Park, Plateau

T14

Acid Caverns, Barrows, Beach, Bramble Valley, Caldera, City Square, Colosseum, Core, Excavation, Mesa, Residence, Sepulchre, Thicket

T15

Arachnid Tomb, Bazaar, Bog, Castle Ruins, Colonnade, Estuary, Foundry, Lava Lake, Summit, Terrace, Vault, Villa

T16

Arachnid Nest, Burial Chambers, Necropolis, Pit