Jenara, Asura of War is my fastest win deck, however it is also the weakest in a multiplayer setting, while it has a lot of control options against a single player, it doesn't have a lot to slow down multiple players either doing crazy things or ganging up on Jenara.

With that being said though, this deck is the one that has the absolute most synergy out of all of my decks. I have seen a lot of Jenara decks that treat her as a lone gunman, a voltron deck that has a lot of instants, sorceries, and enchantments that focus solely on Jenara. While I don't disagree with this, I have a lot more fun playing a deck where even if she is not on the field all of my creatures get terrifying very quickly.

You can see in my list all of the cards that put counters on themselves or other creatures, what is more interesting is the sheer amount of counters that can be placed at one time and other effects that happen when you do.

Card Draw Power:

Fathom Mage explodes with card draw almost immediately when you put her out.

Shapers of Nature Utilizes counters to produce card draw, 2 mana each

Kiora, the Crashing Wave gives you ramp AND draw at the same time!

Bounty of the Luxa Gives mana and card draw every other turn

Zameck Guildmage also gives you +1/+1 counters but makes all of your creatures like Fathom Mage.

Ordeal of Thassa +1/+1 counters and card draw, can be the same turn it is put out

Prime Speaker Zegana will give you a lot of card draw.

Lifegain: This deck has some lifegain. It isn't necessarily built around it, BUT when you gain life you get +1/+1 counters too!

Archangel of Thune has lifelink and whenever you gain life you put a +1/+1 counter on EACH creature.

Blind Obedience is a Kismet lite and has extort as well.

Condemn can be a handy way to get rid of an opponent's creature but it can also save yours from exile! AND Lifegain!

Elixir of Immortality Reshuffle and gain 5 life; handy.

Graypelt Refuge and Sejiri Refuge Free +1/+1 counters on land is very nice.

Primeval Bounty has a LOT of utility, giving counters, tokens AND life!

Cradle of Vitality gives you a lot of counters when you gain a lot of life, unlike Archangel of Thune that gives you 1 counter on each creature no matter how much life you gain.

Enters/Exits the Battlefield:

Cathars' Crusade gives all creatures counters whenever a creature enters.

Celestial Ancient + Oath of the Ancient Wood gives 2 counters for each enchantment that enters.

Death's Presence gives counters equal to a creature's power to another creature when that creature dies, just be careful of Dismiss in Dream and its ilk.

Evolve as a general mechanic is excellent here.

Ivy Lane Denizen gives a counter when a green creature enters.

Llanowar Reborn does it once.

Master Biomancer is a free +2 counters.

Primeval Bounty gives tokens for creatures, life for land, and counters for anything else, sweet!

Renegade Krasis effectively gives all of your other creatures evolve.

One other thing to mention is a combination I have yet to purchase: infinite green mana. Gyre Sage + Umbral Mantle Equip Umbral Mantle of Gyre Sage and, as long as she has more than 3 counters on her she will produce infinite mana. With Bloom Tender this produces infinite card draw. With Shapers of Nature this produces infinite +1/+1 counters, with Fathom Mage out, this also produces infinite card draw. Scavenging Ooze can clear out all graveyards. Simic Manipulator can steal all of your opponent's creatures. Vorel of the Hull Clade can double any counters on artifacts, creatures, or lands infinitely. Zameck Guildmage can make any creatures entering the battlefield have an infinite number of +1/+1 counters. Echoes of the Kin Tree can bolster infinitely. And, lastly, Jenara can boost herself infinitely as well. If I had a way of tapping Gilder Bairn infinitely as well, Kiora would go infinite also.

My other decks: