Dreams¶

Waking in the morning, there's a 50% chance (the server's setting) you wake with a sleep effect. There are 22:

Positive (9), likelier the better you slept: Early Bird, Refreshed, Sweet Dreams, Clear Mind, Dreamt of a Feast, Dreamt of Victory, Lucky Dream, Heroic Dream and Dream of Flight.
Negative (8), likelier the worse you slept: Groggy, Stiff Back, Woke Up Starving, Pounding Headache, Weak Limbs, Bleary Eyes, Haunted and Cursed Dream.
Neutral (5), possible after any night: Night Owl, Vivid Dream, Dream of Fire, Dream of the Sea and Restless Legs.

First the kind is drawn: positive weighs your score minus 40, negative 60 minus your score, and neutral always 20. So a score of 95 is mostly positive with a few neutral, and 20 mostly negative. Then one effect of that kind is drawn by its rarity, among those whose quality range fits your score (Dream of Flight needs 90 or more, Cursed Dream 20 or less):

Rarity	Weight
Common	60
Uncommon	25
Rare	10
Epic	4
Legendary	1

Each effect gives one or more of the game's potion effects, and is shown on the card and in the sleep status, named in its rarity's color with a buff, debuff or neutral icon. Data packs can add more (Sleep effects).

Every sleep effect¶

The score column is the night's score the effect can come after.

Positive¶

Effect	Rarity	Score	Gives
Early Bird	Common	any	Speed (1 min)
Refreshed	Common	any	Haste (1 min)
Sweet Dreams	Common	any	Regeneration (30 s)
Clear Mind	Uncommon	any	Night Vision (2 min)
Dreamt of a Feast	Uncommon	any	Saturation II (instant)
Dreamt of Victory	Rare	60 or more	Strength (1 min)
Lucky Dream	Rare	70 or more	Luck (5 min)
Heroic Dream	Epic	80 or more	Absorption II (2 min), Resistance (1 min)
Dream of Flight	Legendary	90 or more	Slow Falling (1 min), Jump Boost II (1 min), Speed II (1 min)

Negative¶

Effect	Rarity	Score	Gives
Groggy	Common	any	Slowness (1 min)
Stiff Back	Common	any	Mining Fatigue (1 min)
Woke Up Starving	Common	any	Hunger (30 s)
Pounding Headache	Uncommon	any	Nausea (10 s)
Weak Limbs	Uncommon	any	Weakness (1 min)
Bleary Eyes	Rare	40 or less	Blindness (5 s)
Haunted	Epic	30 or less	Darkness (30 s), Bad Luck (5 min)
Cursed Dream	Legendary	20 or less	Poison (5 s), Weakness (2 min)

Neutral¶

Effect	Rarity	Score	Gives
Night Owl	Common	any	Night Vision (45 s)
Vivid Dream	Common	any	Glowing (30 s)
Dream of Fire	Uncommon	any	Fire Resistance (2 min)
Dream of the Sea	Uncommon	any	Water Breathing (3 min), Dolphin's Grace (1 min)
Restless Legs	Rare	any	Jump Boost II (1 min), Mining Fatigue (30 s)