Hailstorm RoundsAmmunition, Attack, AoE, Projectile, Sustained, Cold Tier: 11 Level: 1 Attack Speed: 55% of basePassively generates bolts of ice at a frequency equal to reload time, up to a cap. Activate to Load the accumulated bolts into your Crossbow. All loaded bolts are fired at once, causing them to rain down over the target area.Converts 80% of Physical Damage to Cold Damage Impact radius is 1.2 metres Rain radius is 2.5 metresPlace into a Skill Gem socket to gain this skill. These are found in the Skill Gems panel.
The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.
Gem tier
Support gems
I
Cold InfusionCold InfusionAttack, Cold Tier: 1 Level: 1Supports Attacks, causing them to Gain Cold Damage but deal less Fire and Lightning DamageSupported Attacks Gain 25% of Damage as extra Cold Damage Supported Attacks deal 50% less Fire and Lightning DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
LeverageLeverageTier: 1 Level: 1Supports skills which Hit Enemies. Supported Skills gain increased chance to Critically Hit against Immobilised Enemies.Supported Skills have 50% increased Critical Hit Chance against Immobilised EnemiesPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Martial TempoMartial TempoAttack Tier: 1 Level: 1Supports Attacks, causing them Attack faster.Supported Skills have 25% more Attack SpeedPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
II
Close CombatClose CombatAttack Tier: 2 Level: 1 Cost & Reservation Multiplier: 140%Supports Attacks, causing them to deal more damage to enemies based on how close they are to you.Supported Skills deal 25% more Attack Damage to enemies within 1 metre of you, scaling down to no bonus at 3.5 metres or furtherPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Cold PenetrationCold PenetrationCold Tier: 2 Level: 1 Cost & Reservation Multiplier: 120%Supports any skill that Hits enemies, making those Hits Penetrate enemy Cold resistance.Supported Skills Penetrate 30% Cold ResistancePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Primal ArmamentPrimal ArmamentAttack Tier: 2 Level: 1 Cost & Reservation Multiplier: 120%Supports Attacks that use a weapon, causing them to deal more weapon Elemental damage.Supported Skills deal 25% more Weapon Elemental DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
III
Cold ExposureCold ExposureCold, Duration, Critical Tier: 3 Level: 1 Cost & Reservation Multiplier: 120%Supports any skill that Hits enemies, causing it to inflict Cold Exposure when it Critically Hits an enemy.Supported Skills inflict Cold Exposure for 8 seconds on Critical Hit with Cold DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Elemental FocusElemental FocusTier: 3 Level: 1Supports any skill that Hits enemies, causing it to deal more Elemental Damage but be unable to inflict Elemental Ailments.Supported Skills deal 25% more Elemental Damage Supported Skills cannot inflict Elemental AilmentsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Nimble ReloadNimble ReloadTier: 3 Level: 1Supports Crossbow Ammunition Skills, causing them to Reload bolts significantly faster.Supported Skills have 60% increased Crossbow Reload SpeedPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Item acquisition
Hailstorm Rounds has restrictions on where or how it can drop.