Evol is a group of three FIRE-attribute sub-archetypes: Evoltile, Evolsaur, and Evolzar. As suggested by the Archetype's name, the deck depicts the evolution of a Reptile, as it evolves into a Dinosaur and finally into a Dragon. The archetypes are first introduced in Photon Shockwave, and have continued to gain additional support in each booster pack.
Evoltile monsters are the first stage in the "evolution", as they have a Reptile typing and resemble various prehistoric reptiles. Their name is a Portmanteau of "Evolution" and "Reptile", as they are a sub-archetype of reptiles.
Their effects focus on the special-summon of Evolsaurs, hence "Evolving" to the next stage.
A portmanteau of "Evolution" and "Dinosaurs", Evolsaurs are the next stage with the evolution. As their name suggests, they are Dinosaur-type, and resemble prehistoric dinosaurs.
Their effects can only be used when they are Special Summoned by Evoltiles, creating a reliance on the evolutionary process of their predecessors.
The final Evol sub-archetype, Evolzars are the final stage of evolution, and are large dragons with one of the most powerful effects in the game. The term "Evolzar" is a portmanteau of "Evolution", and "Czar".
All 3 of the Evolzars have effects involving on the negation of cards, showing the controlling "Czar"-like abilities of the dragons.
 Game Play
The main goal of the deck is to bring out the boss monsters, the Evolzars, as summoning the boss monsters early in the game will nearly guarantee a win.
To achieve this, quick special-summons are used within the deck, primarily with Evoltile Najasho who creates the most common plays within the deck, as its combination with Evo-Force generate card advantage and allow for the quick summoning of the Evolzars.
However, protection of the Evolzars is required, as they are susceptible to baiting from the opponent. Therefore, a large amount of protection cards and/or Traps are generally used in Evol decks, such as Forbidden Lance.