A Slow is a mechanic that impacts a Hero's movement speed. They are percentage based, and are based on the enemy Hero's current movement speed.

For example, if you had 700 Base MoveSpeed and an effect granting you +10%, your new MoveSpeed would be 770. If you got another 10%, it would go up by only +70 and not by +77 because it’s still calculated from your Base MoveSpeed. Additionally, if you were Slowed by 20%, it would be a -140 regardless of your current actual MoveSpeed as Slows are taken from your Base MoveSpeed as well.

On the topic of Slows: unlike MoveSpeed Buffs, they do not stack. If someone Slows you by 20% and someone else applies a Slow by 10%, you will be Slowed by only 20% as the greater value is the one that applies. That said, the game does track Slow durations. Meaning if the 20% Slow is for 2 seconds and the 10% Slow is for 4 seconds, you will Slowed by 20% for 2 seconds and then by 10% for the remaining 2 seconds after the first Slow wears off.

It is impossible to Slow someone so much they cannot move. The minimum MoveSpeed in Paragon is 150, and the maximum is 1000.

Hero AbilitiesAffinities (Death/Chaos/Growth/Knowledge/Order) ● AuraBasic and Ability ArmorAttributes (Agility/Vitality/Intellect) ● CardsCooldownCooldown ReductionExperienceJumpGemsGoldHealthManaMovement Speed (Movement Speed Penalty)
Attack Armor PenetrationAttack SpeedBasic AttackBasic Attack TimeBasic Attack ModifiersDamage over timeLifestealPower
Status Effects, Buffs and Debuffs BlindCrowd ControlImmunityMetamorphosisRewindShadow PlaneShieldSilenceSlowStasis
World AgoraMinimapBackdoor ProtectionCoreFog WallsFountainJump PadMinionsNeutral Monsters (Aqua Camp/Black Camp/Fangtooth/Gold Camp/Green Camp/Prime Helix Guardian/River Camp/White Camp) ● TowerWards
Gameplay GankingHarassmentInitiatingJunglingKillLanePushingRespawnTraits
Legacy Red CampBlue CampAltarAmber LinkHarvester (Harvester Keys) ● RaptorsShadow PadsTravel Mode