Scald
Fireball always critically strikes enemies below 30% health. When Fireball or Scorch damage an enemy below 30% health, Fireball deals 25% increased damage and Scorch deals 250% increased damage.
Tree position
In the Fire Mage talent tree, Scald sits in the Fire specialization talents, row 6 of 11. It is a single-point node. Its row opens once 8 points are spent in Fire Talents.
Connected above
The tree draws a line into Scald from Flame On and Scorch.
Flame OnFire Blast gains 1 additional charge and its cooldown is reduced by 2.1 sec.
ScorchScorches an enemy for (100% of Spell Power) Fire damage. When cast on a target below 30% health, Scorch is a guaranteed critical strike. Castable while moving.
Connected below
Scald leads on to Conflagration, Intensifying Flame and Spontaneous Combustion.
ConflagrationFire Blast deals (40% of Spell Power) additional Fire damage to up to nearby enemies.
Intensifying FlameWhile Ignite is on 3 or fewer enemies it flares up dealing an additional 30% of its damage to affected targets.

Same row
Also on this row: Heat Shimmer, Controlled Destruction, Mote of Flame and Blast Zone.
Heat ShimmerWhile Combustion is not active, damage from Ignite has a small chance to make your next Scorch instant, deal 100% increased damage, and deal damage as though your target was below 30% health.

Mote of FlameAll Fire damage dealt increased by 3%.
Blast ZoneMeteor's cooldown is reduced by 15 sec.
Talent trees
Scald is in the talent tree of 3 specializations. Mage: Arcane (DPS), Fire (DPS), Frost (DPS).
Scald Changes by patch
Tracked changes to this talent between game data builds, newest first.
- First tracked in the game data (patch 12.1.0)