Evolution of the Lahessi

Evolution of the Lahessi is the 9th expansion of the Korakhosverse. It's the first set of the Medranos block and was released on August 3rd, 2017.

Set Details
Evolution of the Lahessi contains 269 cards (101 commons, 80 uncommons, 53 rares, 15 mythics and 20 basic lands). It is heavily focused on +1/+1 counters and the concept of growth and evolution.

Storyline
Medranos is the most abundant plane of the Multiverse. In Medranos, new ecosystems are born every day. But its plenitude is being threatened, for the lahessi, creatures who had been believed to be a myth, have come to consume it. To stop the lahessi threat, Orriana Galerider must find the origin of the Lahessi and see if they have a weakness. With the help of Garruk, the Unfathomable, and the newcomers Suvia and Arina Nisita, she shall explore the dying Medranos to find salvation before it is too late.

Mechanics
Evolution of the Lahessi heavily focuses on the concept of growth and evolution, which is represented by the following mechanics. It also focuses on those who seek to destroy this growth, either by feeding on it or by being heralds of corruption and decay: The set also features the mechanic Changeling, first seen in Lorwyn, to represent the Memekri, a Medranian species that achieve a physical form by imitating those around them.
 * Adaptive (This creature enters the battlefield with an additional +1/+1 counter on it if an opponent controls a creature with greater power.)
 * Growth counters (You may pay two growth counters at any time you could cast a sorcery to create a 1/1 green Saproling creature token or untap target basic land.)
 * Proliferate, first seen in Scars of Mirrodin.
 * Devour, first seen in Shards of Alara
 * Reap - [cost], Exile two cards from your graveyard:

Limited Archetypes
Evolution of the Lahessi features eleven archetypes:
 * W: Defenders.
 * U: Self-Mill.
 * B: Discard.
 * R: Lands.
 * G: Saprolings tribal.
 * WU: Enter the battlefield effects/blink.
 * UB: Graveyard matters.
 * BR: Sacrifice.
 * RG: Fight.
 * GW: +1/+1 counters.
 * Any: Lahessi tribal.

Card types and Counters
Evolution of the Lahessi introduces lahessi as a new creature subtype and growth counters as a new type of counter.