Knockback Fin

Seekers of the Storm - DLC Content Knockback Fin is part of the Seekers of the Storm DLC. It is only available if the DLC is enabled when starting a run. Click for more info.Knockback Fin
On hit, enemies are knocked into the air.
7.5% (+7.5% per stack) chance on hit to knock enemies into the air. (Height increases per stack).
Rarity	Common
Category	Utility HalcyoniteShrine
Stats
Stat	Value	Stack	Add
Chance	7.5%	Hyperbolic	+7.5%
Upwards Force	20	Linear	2

The Knockback Fin is an Item in Risk of Rain 2, introduced in the Seekers of the Storm expansion. The item has a 7.5% (+7.5% per stack) chance on hit to knock gounded enemies into the air. The height increases with each stack, effectively increasing the landing impact velocity by 20 (+2 per stack).

Notes

• This item is unaffected by luck.
• Knockback Fin cannot affect Bosses, Special Bosses, ScavengersScavenger
  Item HoarderHP: 3800 (+1140 per level)
  Damage: 4 (+0.8 per level)
  Class: Ranged
  Speed: 3 m/s
  Armor: 20, characters immune to fall damage, e.g., LoaderLoaderThe Loader is a slow but powerful bruiser that can use her grappling hook to uniquely navigate the environment.
  Class: Melee
  HP: 160 (+48 per level)
  Damage: 12 (+2.4 per level)
  Armor: 20
  Umbra: Bionic Powerhouse, any flyers even if they are forced to touch the ground, any stationary characters, e.g., Survivors of the Void - DLC Content
  Alpha Construct is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
  Click for more info. Alpha ConstructSurvivors of the Void - DLC Content
  This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
  Click for more info.Alpha Construct
  HP: 100 (+30 per level)
  Damage: 12 (+2.4 per level)
  Class: Ranged
  Speed: 0 m/s
  Armor: 0 and Survivors of the Void - DLC Content
  Void Barnacle is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
  Click for more info. Void BarnacleSurvivors of the Void - DLC Content
  This content is part of the Survivors of the Void DLC. It is only available if the DLC is enabled when starting a run.
  Click for more info.Void Barnacle
  HP: 225 (+68 per level)
  Damage: 6 (+1.2 per level)
  Class: Ranged
  Speed: 0 m/s
  Armor: 0, and any ground characters that are not grounded at the moment of getting hit.
• Upon getting knocked up, the target cannot be knocked up again for 5 seconds. However, even if an enemy is in the air for longer than this, it is impossible to juggle them as the knock-up effect is only applied when an enemy is grounded.
• The landing impact velocity is unaffected by the monster's weight or the Environment's gravity, e.g., CommencementCommencement (Final)
  Moon of Petrichor V
  You dream of glass and dirt.
  
  Large domain located above the shattered breach of Petrichor V's moon. It is made up of the shattered remains of four individual sections, emblematic of MithrixMithrix
  King of NothingHP: 1000 (+300 per level)
  Damage: 16 (+3.2 per level)
  Class: Melee / Ranged
  Speed: 15 m/s
  Armor: 20 and Providence's tools of creation., because the motion is governed by a simple kinematic equation so the velocity they leave the ground with is the same velocity they land with.
• The fall damage is defined by the formula $max(0,landingVelocity-jumpPower-20)\times maxHealth/60$, where jumpPower is a value specific to each monster, generally ranging between 15 and 20. As such, in order to be knocked up high enough in the air to receive fall damage, 9 to 11 stacks are required.
  • Since each additional stack increases the landing velocity by 2 and the fall damage increases by $maxHealth/30$, it requires a further 30 stacks to kill a monster from fall damage after knocking it up once.
• While the target is launched upwards with a certain force, they are also pushed with half of the same force away from the attacker's aiming direction, therefore making the launching trajectory an arc.
  • For projectile attacks, which arrive after a delay, the player can attack an enemy and then directly look upwards, which can result into a 150% launching velocity upwards, thereby requiring fewer stacks to inflict fall damage.
• Knockback Fin can effectively slow down meele monsters from getting in range of the player. This has some conceptual similarities with Stun GrenadeStun Grenade
  Chance to stun on hit.
  5% (+5% on stack) chance on hit to stun enemies for 2 seconds., however, it can be argued the latter is a generally more useful item; it can also affect non-grounded enemies and it can be applied continuously thus perpetually stunning a monster in place and making them a sitting duck, while Knockback Fin will push them away from your aiming position thus making it harder to continuously apply damage. Additionally, since Knockback Fin does not cancel any attacks, by launching an Elder LemurianElder Lemurian
  HP: 900 (+270 per level)
  Damage: 16 (+3.2 per level)
  Class: Ranged
  Speed: 13 m/s
  Armor: 0 into the air, it makes their Fireball Volley attack harder to avoid since the fireballs can be fired at an angle to the ground and effectively explode near the player.
• Knockback Fin can affect even survivors, except from Loader, so in theory one could combine this with the Artifact of Chaos to get to normally unreachable locations.
  • On CommencementCommencement (Final)
    Moon of Petrichor V
    You dream of glass and dirt.
    
    Large domain located above the shattered breach of Petrichor V's moon. It is made up of the shattered remains of four individual sections, emblematic of MithrixMithrix
    King of NothingHP: 1000 (+300 per level)
    Damage: 16 (+3.2 per level)
    Class: Melee / Ranged
    Speed: 15 m/s
    Armor: 20 and Providence's tools of creation. by getting to the tallest natural location, which is the roof of the Pillars of Blood area, one needs approximately 65 stacks to reach the arena by hitting themselves or another ally. If the attacker is looking up at the moment they damage the intended target, they will only require 2/3rds of that, i.e., approximately 42 stacks. For example, CommandoCommandoThe Commando is a jack-of-all-trades character that is reliable in all situations of the game.
    Class: Ranged
    HP: 110 (+33 per level)
    Damage: 12 (+2.4 per level)
    Armor: 0
    Umbra: Cornered Gunslinger can throw a Frag GrenadeFrag Grenade (Special)Throw a grenade that explodes for 700% damage. Can hold up to 2.
    Survivor: Commando onto the ground near himself and then slide/roll towards it while looking up. MUL-TMUL-TMUL-T is an aggressive survivor who has the tools necessary for any job!
    Class: Melee / Ranged
    HP: 200 (+60 per level)
    Damage: 11 (+2.2 per level)
    Armor: 12
    Umbra: Right Tool for the Wrong Job can use a combination of Blast CanisterBlast Canister (Secondary)Stunning. Launch a canister for 220% damage. Drops stun bomblets for 5x44% damage.
    Survivor: MUL-T and Transport ModeTransport Mode (Utility)Heavy. Zoom forward, gaining 200 armor and 220% movement speed. Deals 250% damage to enemies.
    Survivor: MUL-T to achieve the same thing.
  • Self-hitting attacks, such as REX'sREXREX is a half robot / half plant that uses HP to cast devastating skills from a distance. The plant nor the robot could survive this planet alone – but thankfully they have each other.
    Class: Ranged
    HP: 130 (+39 per level)
    Damage: 12 (+2.4 per level)
    Armor: 20
    Umbra: Symbiotes skills, do not proc any effects on the survivor and by extension this item as well.

Lore

Shipping details
Order: Knockback Fin
Estimated Delivery: 01/01/2057
Shipping method: Biological

Sent to:
Fort Joseph
UES B1053 Port Station,
Boron System

Order details:
Impressed? I know you are.
We finally cleared our grid, but man did it put up a fight. We lost James and Kight. This fin knocked them off the U.E.S.S. [REDACTED] with so much force we heard them hit the water in pieces. At least it was quick.

There isn’t a speck of land on this blasted planet but now it’s safe enough to build our first dock. It’s not land, but it’s a step up from this flotsam. I won’t miss giant sea creatures bumping the ship in the night, or losing my lunch to this damn swaying.

Get us a good commission for it will ya? And send down some playing cards, the silence is killing us. 

- Private Bowen

Version History

Seekers of the Storm

• Added New Item: Knockback Fin