Movement Slow

Movement Slow is a status effect applied by many items and abilities that slows move speed by a percentage.

Movement Slow cannot reduce a player's speed below 2.0 m/s in-game (or 80 hammer units per second).

Math

Slows from multiple sources are stacked diminishingly.

The formula for movement slow is: $Total Slow = 1 - \prod_{i = 1}^{n} (1 - {Slow}_{i})$
where ${Slow}_{i}$ is the percent slow amount.

For example, multiple sources of movement slow:

25% movement slow from Slowing Bullets
25% movement slow from Point Blank results in:

$1 - (1 - 0.25) * (1 - 0.25) = 43.75 % movement slow$

Movement Slow Resist

Movement Slow Resist is applied after the final slow percentage is calculated.

For example, if the player had Enduring Speed with 40% Movement Slow Resist in the above example of 43.75% slow, actual speed would be only be 26.4% slowed.

Sources

Movement Slow

Heroes

List of heroes
Hero	Ability	Slow amount
Bebop	Hyper Beam	25%
Bebop	Hyper Beam to self	?
Dynamo	Kinetic Pulse (T1)	35%
Grey Talon	Rain of Arrows (T2)	40%
Grey Talon	Ability Immobilizing Trap not found	50%
Haze	Fixation (T1)	15%
Infernus	Catalyst	40%
Ivy	Kudzu Bomb	35%
Ivy	Air Drop	30%
Kelvin	Frost Grenade	40%
	Arctic Beam	40%
	Frozen Shelter	35%
Lady Geist	Malice	15% × n stacks
Lash	Ground Strike (T2)	50%
	Flog (T1)	35%
	Death Slam	50%
McGinnis	Mini Turret (T1)	25%
	Spectral Wall (T1)	20%
	Heavy Barrage (T1)	30%
	Heavy Barrage to self	?
Mirage	Djinn's Mark	80%
Mo & Krill	Sand Blast (T3)	50%
Paradox	Pulse Grenade	30%
Paradox	Time Wall	80%
Pocket	Barrage	30%
Seven	Lightning Ball (T2)	35%
Shiv	Serrated Knives	35%
Vindicta	Stake	30%
Viscous	Splatter	35%
	Puddle Punch	20%
	Puddle Punch (T2)	40%
Warden	Alchemical Flask	20%
Yamato	Power Slash (T2)	40%
Yamato	Flying Strike	30%

Items

List of items
Name	Cost	Category	Stat change
Slowing Bullets	1,250	Weapon	+25% Movement Slow
Point Blank	3,500	Weapon	+25% Movement Slow
Lucky Shot	6,000	Weapon	+30% Movement Slow
Glass Cannon	7,250	Weapon	+25% Movement Slow
Majestic Leap	3,000	Vitality	+40% Movement Slow
Lifestrike	3,500	Vitality	+60% Movement Slow
Colossus	6,000	Vitality	+30% Movement Slow
Inhibitor	6,000	Vitality	+20% Movement Slow
Phantom Strike	6,000	Vitality	+50% Movement Slow
Cold Front	1,250	Spirit	+40% Movement Slow
Slowing Hex	1,750	Spirit	+20% Movement Slow
Mystic Slow	4,250	Spirit	+25% Movement Slow
Mystic Reverb	6,000	Spirit	+40% Movement Slow