Patch 3.1

Patch 3.1 was released on August 14th 2016. It added new badge levels, going from 10 to 20, changed the amount of cards coming from packs and rebalanced a number of cards, as well as moving some of them to the Neutral faction, to allow for more deck variety.

Competitive play

 * Tournament mode now has 4 additional card picks, bringing the total to 24.
 * The number of Badge Levels has been expanded from 10 to 20.

Shop

 * Age of Dragons Packs are back!
 * Normal Card Packs have been renamed to "Wild Pack" to better indicate they can contain cards of any set.
 * Store packs have been rebalanced with 5 cards, with legendary and epic drop rates increased to maintain an equivalent per-pack drop rate.
 * Premium pack prices have been slightly reduced, and bundle tiers altered.
 * The rewards from timed Mini Packs are now more random

Neutrals

 * Acolyte: Is now a 2/2 with 2 range
 * Armory: Cost increased to 5.
 * Blessing of the Treans: Changed to a standard Melee unit buff of +1/+4.
 * Door Knight: Health increased to 7.
 * Elvish Hunter: Health reduced to 3.
 * Fencer: Decreased Movement to 3 and increased Health to 7.
 * Flux Dabes: Cost increased to 4.
 * Hasan City Guard: Health reduced to 3.
 * Infernal Furnace: Initial damage reduced to 2, cost reduced to 2.
 * Sacrificial Altar: Its cost has been increased to 3 and the Health benefit removed.
 * Shaman: Attack reduced to 1.
 * Troll Gunner: Is now a 1/2.
 * Talibos: Attack increased to 3.
 * Vileroth the Devourer: Health reduced to 5 on account of the card being moved to neutral.

Crusaders

 * Dramoth, the Eternal: Heal reduced to 3.
 * Heal: No longer draws a card.
 * Monk: Ability changed to heal 2 instead of granting max health. HP reduced to 7.
 * Shroud of the Redcloacks: Changed to only target units. Castles cannot wear cloaks!

Ninjas

 * Hidden Intent: Cost reduced to 2.
 * Shoden, the Zen Master: Viking buff has been fixed to only include lightning. Graphics fixed on all buffs.
 * Vanish: Cost reduced to 2 and cost reduction reduced to 3.

Pirates

 * Dread Pirate Robins: Health reduced to 4.
 * Salahar Voyager: Monster price bonus reduced from 7 to 5.

Warlocks

 * Flame: Damage reduced to 2.
 * Flames of Eternity: Damage reduced to 2.
 * Hardened Scales: Reduced to +2/+2.
 * Incinerate: Cost increased to 4.
 * Witch Bolt: Damage reduced to 3.

Vikings

 * Dragon Bolt: Damage reduced to 2, cost reduced to 2.
 * Iceweaving: Damage reduced to 1, cost reduced to 1.
 * Lightning Bolt: Damage reduced to 2.
 * Ludicrous Strength: Reduced to +5/+5.
 * Rampage: Cost increased to 3.
 * Shattering Strike: No longer has a Focus requirement.
 * Temple of the Five Gods: Cost increased to 3.
 * WAR PARTY!: Cost increased to 5.

Reference

 * Monster Island Patch 3.1! on Reddit.