In Cornelius von Helsinki’s galleries

Death: draw a card and return a random minion to its owner's hand

When your opponent plays an Action: cancel it and destroy a random enemy minion

During your opponent's turn: the first Minion they play costs 2 more

Deal 2 damage to every minion
At the end of your turn: deal 1 damage to a random enemy minion

Hellfire Muster: 1x: give a friendly Demon +1/+1

Guard. Reach.

Brass claws hold the road; iron stingers watch the sky.

Deal 3 damage to every character

At the end of your turn: return every enemy minion with 2 or less health to its owner's hand

Guard.
On arrival: strip a minion

Flying.
On arrival: deal 2 damage to a character

Flying.
On arrival: draw 2 cards and gain 2 mana this turn

Ready.

She was already moving when the doors opened.

At the end of your turn: restore 1 health to a random friendly minion

On arrival: give every friendly Statue +1/+1

At the end of your turn: give a friendly minion +1/+1

Guard.
On arrival: summon a Plinth Mouse

Guard.
Death: summon a Plinth Mouse

Flying.
On arrival: gain 2 mana this turn

While it is in play: your Equipment costs 1 less, to a minimum of 1

At the end of your turn: restore 2 health and give 1 armour to a random damaged friendly minion

At the end of your turn: summon a Basic Slime Girl