Quicksand

The Decay Ability on Quicksand will be triggered at the end of each round instead of the beginning. 

Death's Companion

Death's Companion is getting the Range attribute added to its attack. This addition allows its attack to attack another Aerial summons.

Angel of Retribution

Angel of Retribution is getting the Range attribute added to its attack. This addition allows its attack to attack another Aerial summons.

Concussion Punch

Due to the speed of Concussion Punch's attack ability it is moving from a "Basic Attack [2]" to a "Heavy Attack [2]".

Inferno Pits

Inferno Pits is now triggered when a champion or summon moves on or is placed on the spot the alteration is.

Libraries of Sahas

Libraries of Sahas is now triggered when a champion moves on or is placed on the spot the alteration is.

Treacherous Terrain

Treacherous Terrain is now triggered when a champion or summon moves on or is placed on the spot the alteration is.

Idiris

The champion, Idiris, is gaining a Heavy Attack [1] ability due to the fact that after she runs out of Aura her primary offensive ability is useless. This will help mitigate her weaknesses during late game.

Skeleton King

First printings of this card said, ". . . can only be resurrected if another summon has been killed this turn." and " . . . Place Skeleton King on a spot where a summon has been killed this turn . . .". All the instances of the word "turn" are now "round".

Skeleton King is getting its second errata in two sets. Its Resurrect ability is now becoming a Resurrect Beckon ability; it functions the exact same but is now a beckon ability like every other summon.