|Instant, Sorcery, Enchantment, Artifact (4)|
This is a go-wide tribal deck with combo elements to it. The deck is largely built around ramping multiple Elves into play fast off Llanowar Elves and Elvish Mystic – this then enables you to produce a lot of mana off Elvish Archdruid and Circle of Dreams Druid which you can then use to activate Allosaurus Shepherd or Elvish Warmaster to pump your whole board and attack for lethal fast.
The deck is incredibly linear and capable of some insanely fast starts, plus the addition of Leaf-Crowned Visionary as a two mana lord that produces card advantage is huge and gives the deck more ways to grind into the mid-late game. This is another great Collected Company deck since it can hit all of your ‘combo pieces’ like Elvish Archdruid, Circle of Dreams Druid, Allosaurus Shepherd, and Elvish Warmaster at the end of the opponent’s turn, often allowing you to combo out of nowhere the following turn.
Additionally you have access to Karn, the Great Creator which gives you outs to a lot of situations that would otherwise be impossible to beat and the passive is really strong against Thopters and Affinity, and also stops Greasefang, Okiba Boss from crewing Parhelion II. Tormod's Crypt gives you a way to stop Dragonstorm combo and reanimator, Haywire Mite gives you an out to Nine Lives + Solemnity, Transmogrifying Wand can kill Serra's Emissary naming creature, and Staff of Domination essentially acts as a 1 card combo – it lets you draw your whole deck and produce infinite mana if you have Elvish Archdruid or Circle of Dreams Druid and 5 Elves in play – you can then win the same turn by fetching Aetherflux Reservoir once you draw another Karn, the Great Creator.
Weaknesses: Elves is incredibly soft to sweeper effects like Divine Purge and Brotherhood's End, so it will usually have a very bad matchup against the controlling decks. Thankfully control is a fairly small part of the metagame and not many other decks are running sweepers.
When is it good to play? Elves is largely a good choice to play if sweepers aren’t very common.