Mana Regeneration Band

Type	AccessoryCrafting material
Tooltip	Increases maximum mana by 20; Increases mana regeneration rate
Rarity
Sell	1
Research	1 required

The Mana Regeneration Band is an accessory item made by combining a Band of Starpower and a Band of Regeneration at a Tinkerer's Workshop. It somewhat combines the effects of both bands, expanding a player's mana pool and converting the bonus health regeneration provided by the Band of Regeneration into mana regeneration.

Since it requires a Band of Starpower, the player will need a Corruption biome to obtain it, as it will only drop from Shadow Orbs or Corrupt Crates. However, in the 3DS version, the Band of Starpower can often be found in Living Wood Chests in Living Trees. In the Desktop version and Mobile version, it can be obtained in Crimson worlds by crafting it from the Panic Necklace or fishing in an artificial Corruption biome, created with Corrupt Seeds bought from the Dryad in a Hardmode Graveyard.

Crafting[]

Result	Ingredients	Crafting station
Mana Regeneration Band	Band of Starpower Band of Regeneration	Tinkerer's Workshop

Result	Ingredients	Crafting station
Magic Cuffs	Mana Regeneration Band Shackle	Tinkerer's Workshop

In detail, the accessory has a twofold effect on mana regeneration:^[1]
- It halves the regeneration delay after spending mana, e.g. using a magic weapon. If standing still or having the Mana Regeneration buff, it only reduces the delay by 33.33*1/3 (33.33%).
- It increases the regeneration rate by a certain value, which ranges from +2.875 mana/sec to +14.375 mana/sec, depending on how full the wearer's mana bar is. The exact value can be calculated by adding 2.875 to 11.5 * (cur/max), where cur is the current and max the maximum mana. The following table demonstrates this with some exemplary values:

The bonus is flatly added to the natural mana regeneration. It does not matter if the player is moving or standing still.

Due to the base mana regeneration rate increasing with maximum mana, this flat bonus becomes exponentially less significant the more maximum mana the wearer has. For instance, while the bonus regen is equivalent to nearly a +650% boost at 20 maximum mana, it equals merely a +57% boost at 300 maximum mana. The exact factor for any amount of maximum mana can be calculated by dividing max+182 by max+7. The following table demonstrates this with some exemplary values:

The Mana Regeneration Band does not grant a permanent increase to health regeneration like the Band of Regeneration, even though it is part of its recipe.
The bonus maximum mana capacity does stack with that of the Band of Starpower.

Its mana regeneration ability works in the same way the Band of Starpower did in the Pre-Release.

↑ Information taken from the Desktop 1.4.0.5 source code, method UpdateManaRegen() in Terraria.Player.cs. There may be inaccuracies, as the current Desktop version is 1.4.2.3.