Sword of the Animist [Magic Origins] Conspiracy there is a new mechanic

there is a new mechanic called "Herd Bonus

Set: Ninth Edition Type: Creature — Zombie Rarity: Rare Cost: {1}{B}{B} Other Zombie creatures get +1/+1

Set: Coldsnap Type: Creature — Avatar Rarity: Rare Cost: {6}{B} Flying

choose "left" or "right

[1WW] Blizzard Edge (160)

Sword of the Animist [Magic Origins] Conspiracy there is a new mechanicSet: Magic Origins Type: Legendary Artifact Equipment Rarity: Rare Cost: {2} Equipped creature gets +1 +1. Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Equip {2} The blade glows only for Zendikar's chosen.