Back Stab (Blue)

Stealth 
Defense reactions can't be played to Back Stab's chain link.

Isolate (Blue)

Stealth
Dominate (The defending hero can't defend with or play more than 1 defending card or defense reaction from their hand this chain link.)

Shred (Blue)

Target card defending an Assassin attack gets -2{d} this combat chain.

Surgical Extraction

Contract - You are contracted to banish opponents' blue cards. Whenever you complete this contract, create a Silver token.
When this hits a hero, banish the top card of their deck, then look at their hand and banish a card.

Arcane Lantern

Arcane Barrier 1 (If your hero would be dealt arcane damage, you may pay [Resource] instead. If you do, prevent 1 arcane damage that source would deal.)

Blacktek Whisperers

While Blacktek Whisperers is in your graveyard, at the start of your turn, you may destroy 2 Silvers you control. If you do, equip Blacktek Whisperers.
Attack Reaction -- Destroy Blacktek Whisperers: Target Assassin attack action card gains "When this hits a hero, it gains go again."
Battleworn (When the combat chain closes, if this defended, put a -1{d} counter on it.)

Crown of Providence

When you defend with Crown of Providence, you may put a card from your hand or arsenal on the bottom of your deck. If you do, draw a card.

Blade Break (When the combat chain closes, if this defended, destroy it.)

Flick Knives

Once per Turn Attack Reaction -- 0: Target dagger you control that isn't on the active chain link deals 1 damage to target hero. If damage is dealt this way, the dagger has hit. Destroy the dagger.
Blade Break (When the combat chain closes, if this defended, destroy it.)

Nerve Scalpel

Once per Turn Action -- {r}{r}: Attack. Go again
Piercing 1 (If this is defended by an equipment, it has +1{p}.)
When this hits a hero, the next time they defend with 1 or more reaction cards this turn, those cards have -1{d} while defending.

Snapdragon Scalers

Attack Reaction - Destroy Snapdragon Scalers: Target attack action card with cost 1 or less gains go again.

Spider's Bite

Once per Turn Action -- {r}{r}: Attack. Go again
Piercing 1 (If this is defended by an equipment, it has +1{p}.)
When this hits a hero, the next time they defend with 1 or more attack action cards this turn, those cards have -1{d} while defending.

Already Dead

Contract - You are contracted to banish opponents' non-action cards. Whenever you complete this contract, create a Silver token.
When this hits a hero, banish the top card of their deck and a defending card.

Command and Conquer

Defense reactions can't be played to Command and Conquers chain link.

If Command and Conquer hits a hero, destroy all cards in their arsenal.

Death Touch (Red)

Death Touch can't be played from hand.
When this hits a hero, create a Frailty, Inertia, or Bloodrot Pox token under their control.

Down and Dirty

While Down and Dirty is in your arsenal, you may defend with it.

Enlightened Strike

As an additional cost to play Enlightened Strike, put a card from your hand on the bottom of your deck.
 
Choose 1;
 
Draw a card.
 - Enlightened Strike gains +2 [Power].
 - Enlightened Strike gains go again.

Fate Foreseen

Opt 1 (Look at the top card of your deck. You may put it on the bottom.)

Hurl (Red)

As an additional cost to play Hurl, you may pay {r}. When you do, it gains "When this attacks, target dagger you control deals 1 damage to target hero. If damage is dealt this way, the dagger has hit. Destroy the dagger."
Go again

Infect (Red)

Stealth
When this hits a hero, create a Bloodrot Pox token under their control.

Isolate (Red)

Leave No Witnesses

Contract - You are contracted to banish opponents' red cards. Whenever you complete this contract, create a Silver token.
When this hits a hero, banish the top card of their deck and up to 1 card in their arsenal.

Nimble Strike (Red)

As an additional cost to play Nimble Strike, you may banish a card named Nimblism from your graveyard. If you do, Nimble Strike gains +1 [Power] and go again.

Nimblism (Red)

The next attack action card with cost [1 Resource] or less you play this turn gains +3 [Power].
 
Go again 

Oasis Respite (Red)

Prevent the next 4 damage that would be dealt to target hero this turn by a source of your choice. If they have less life than each other hero, they may gain 1{g}.

Scar for a Scar (Red)

When you play Scar for a Scar, if you have less [Life] than an opposing hero, it gains go again.

Shake Down

Uzuri Specialization (You may only have this in your deck if your hero is Uzuri.)
If you've played or activated an attack reaction this chain link, Shake Down has "When this hits a hero, choose red, yellow, or blue. They reveal their hand. Banish a card of the chosen color."

Shred (Red)

Target card defending an Assassin attack gets -4{d} this combat chain.

Sink Below (Red)

You may put a card from your hand on the bottom of your deck. If you do, draw a card.

Wreck Havoc (Red)

Defense reactions can't be played to Wreck Havoc's chain link.
When this hits a hero, you may turn a card in their arsenal face up, then destroy a defense reaction in their arsenal.

Codex of Bloodrot

Each hero puts a card from their hand face down into their arsenal.
Create a Ponder token under your control and a Bloodrot Pox token under each opponent's control.
Go again

Codex of Frailty

Each hero puts an attack action card from their graveyard face down into their arsenal. Each hero that does, discards a card.
Create a Ponder token under your control and a Frailty token under each opponent's control.
Go again

Isolate (Yellow)

Shred (Yellow)

Target card defending an Assassin attack gets -3{d} this combat chain.

Spreading Plague

Create X Bloodrot Pox tokens under the defending hero's control, where X is the number of defending cards this chain link.

Uzuri, Switchblade

Once per Turn Attack Reaction -- Banish a card from your hand face down: Turn the card banished this way face up. If it's an attack action card with cost 2 or less, put target attacking card with stealth from the active chain link on the bottom of its owner's deck, then put the banished card onto the active chain link as the attacking card.