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.)

Sedate (Blue)

Stealth
When this hits a hero, create an Inertia token under their control.

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.)

Balance of Justice

Instant - Destroy this: Draw a card. Activate this only if an opponent has drawn 2 or more cards this turn.
Guardwell

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.)

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.)

Fyendal's Spring Tunic

At the start of your turn, if Fyendal's Spring Tunic has less than 3 energy counters on it, you may put an energy counter on it.

Instant - Remove 3 energy counters from Fyendal's Spring Tunic: Gain [1 Resource]

Blade Break (If you defend with Fyendal's Spring Tunic, destroy it when the combat chain closes.)

Mask of Perdition

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

Nullrune Gloves

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

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.

Annihilate the Armed (Red)

Contract - You are contracted to banish opponents' attack action cards. Whenever you complete this contract, create a Silver token. (A contract is active while it's face up in the arena.)
When this hits a hero, banish the top card of their deck.

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.

Cut to the Chase (Red)

Target Assassin attack action card with contract gains +3{p}.
Look at the top card of the defending hero's deck. You may put it on the bottom.

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.

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.)

Frailty Trap

When this defends an attack with go again, create a Frailty token under the attacking hero's control.

Inertia Trap

When this defends an attack with {p} greater than its base, create an Inertia token under the attacking hero's control.

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.

Looking for a Scrap (Red)

As an additional cost to play Looking for a Scrap, you may banish a card with 1{p} from your graveyard. When you do, this gains +1{p} and go again.

Nix the Nimble (Red)

Contract - You are contracted to banish opponents' reaction cards. Whenever you complete this contract, create a Silver token. (A contract is active while it's face up in the arena.)
When this hits a hero, banish the top card of their deck.

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}.

Plunder the Poor (Red)

Contract - You are contracted to banish opponents' cards with cost 1 or less. Whenever you complete this contract, create a Silver token.
When this hits a hero, banish the top card of their deck.

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."

Sigil of Solace (Red)

Sink Below (Red)

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

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

Eradicate

Contract - You are contracted to banish opponents' yellow cards. Whenever you complete this contract, create a Silver token.
When this hits a hero, banish the top X cards of their deck, where X is the damage dealt by Eradicate.

Remembrance

Shuffle up to 3 action cards from your graveyard into your deck. Banish Remembrance.

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.