Abaddon/Old Abilities

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## Mark of the Abyss (6.24-6.33)

Mark of the Abyss (6.24-6.33)

**Ability**
Target Unit
**Affects**
Enemies / Allies

Marks a target unit for 20 seconds. All units that attack it will gain a temporary attack speed boost and a 10% movement speed boost.

**Cast Animation:** +**Cast Range:** 1000**Attack Speed Bonus:** 15/30/45/60**Movement Speed Bonus:** 10%**Mark Duration:** 20**Speed Bonus Duration:** 4.5

 45
 75ModifiersMark Of The Abyss Speed BuffAny

Mark Of The Abyss Debuff

NOTES

* This ability got replaced by  Mist Coil in the 6.33 gameplay patch. Its effect got merged into the passive ability.

* Grants the bonus to any allied unit which is not a building or ward upon starting an attack on the marked unit.

### Mark of the Abyss (Pre 6.24)

Mark of the Abyss (Pre 6.24)

**Ability**
Target Unit
**Affects**
Self / Enemies

Marks a target unit, binding Abaddon to it. Abaddon will gain a boost in attack speed. He cannot stop attacking until either he or the mark die.

**Cast Animation:** +**Cast Range:** 1000**Attack Speed Bonus:** 25/50/75/100**Duration:** Until either die

 75
 100ModifiersMark Of The Abyss Speed Buff

Mark Of The Abyss Debuff

NOTES

* This ability got reworked in the 6.24 gameplay patch.

* Abaddon cannot be controlled until he or the target dies. The target is not disabled and can act freely.

## Curse of Avernus (6.33-7.20)

Curse of Avernus (Pre 7.20)

**Ability**
Passive
**Affects**
Allies / Enemies

Abaddon strikes an enemy with chilling curse on each attack, causing all units who attack the slowed enemy to gain increased movement speed, along with faster attack speed, for a limited time.

**Move Speed Slow:** 8%/12%/16%/20% ( 33%/37%/41%/45%)**Attack Speed Slow:** 8/12/16/20 ( 33/37/41/45)**Move Speed Bonus:** 15%**Attack Speed Bonus:** 10/20/30/40**Slow Duration:** 2.5**Bonus Duration:** 4.5ModifiersFrostmourne BuffAny

Frostmourne DebuffAny*The curse that slows an enemy, speeds an ally.*

NOTES 5587
`abaddon_frostmourne`

* This ability got reworked into the current  Curse of Avernus in the 7.20 gameplay patch.

* On each successful attack, Abaddon places a debuff on the target which slows them.
	+ The attacks first apply the debuff, then their own damage.

* Every allied unit which starts attacking a unit which has the Curse of Avernus debuff on, gets the speed increasing buff.

* This means it does not matter if Abaddon is still attacking the unit. As long as a unit has the debuff on, allies get the speed buff upon attacking it.

* The slowing debuff can be placed on buildings, but cannot be placed on wards or allied units.

* The speed increasing buff is not applied on buildings, wards or enemies attacking a debuffed unit.

* Abaddon himself always gets the speed increasing buff upon starting an attack, regardless of the debuff, except when the attack target is a building.
	+ However, after having placed the debuff on a building, Abaddon gets the buff like how allies do upon attacking it.

* Successive attacks on the same target do no stack, but refresh the duration instead. This goes for the buff and debuff.

* Choosing the slow upgrading talent does not affect any of Abaddon's currently placed Curse of Avernus debuffs.

### Frostmourne (Pre 6.33)

Frostmourne

**Ability**
Passive
**Affects**
Enemies

Empowers the legendary sword with the ability to reduce the target's speed.

**Move Speed Slow:** 7%/14%/21%/28%**Attack Speed Slow:** 7/14/21/28**Slow Duration:** 2Modifiers
Curse of AvernusAny

NOTES

* This ability got reworked into the  Curse of Avernus (Pre 7.20) in the 6.33 gameplay patch.

* Frostmourne is a Unique Attack Modifier, and does not stack with other Unique Attack Modifiers.

* Successive attacks with Curse of Avernus do not stack, but refresh the duration instead.