Warmonger's Diplomacy

Starting with the hero to your left, each hero chooses war or peace.
If they choose war, the only actions they may play or activate during their next turn are weapon and attack actions.
If they choose peace, the only actions they may play or activate during their next turn are non-weapon non-attack actions.

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.

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.

Overcrowded

Ambush
When this attacks or defends, it gets +1{p} +1{d} for each different name among aura tokens in the arena.

Sink Below (Red)

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

Shelter from the Storm

Instant -- Discard this: The next 3 times you would be dealt damage this turn, prevent 1 of that damage.

Fate Foreseen

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

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.)

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.)

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.)

Nullrune Boots

Snapdragon Scalers

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

Quickdodge Flexors

Defense Reaction -- {r}: Add this to the active chain link as a defending card. It has 2 base {d} this chain link.
At the beginning of the end phase, if this defended this turn, destroy it.

Nullrune Hood

Balance of Justice

Instant -- Destroy this: Draw a card. Activate this ability only if an opponent has drawn 2 or more cards this turn.
Guardwell (When the combat chain closes, if this defended, put -1{d} counters on it equal to its {d}.)

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.)

Sigil of Solace (Red)

Authority of Ataya

Legendary
When this is pitched, defense reaction cards cost opponents an additional {r} to play this turn.

Riches of Trōpal-Dhani

Legendary
When this is pitched, create a Gold token.

Classic Constructed Staples