Normally the purview of Hydras, the new Tyranid will reward you with powerful X spells, creatures that grow in power over time, and more keywords than you can shake a Bonesword at
Outside of those, the looks of the 42 cards in Through the Ages are beyond distinctive and spread across every rarity
Harrow Variants This slot goes to all the sac a land, get two lands variants
Strengths and Weaknesses There is less overlap between the two types than you may think
In order to compete in the World Championship in this structure you must have placed top four in MPL, placed top four in the Challengers/Rivals League, won one of the seven tabletop or arena Mythic Championships, or won of the previous year's World Championship
I would recommend that you pick up a copy if you don't own one