Mana Ramp, Monstrous Creatures, Counters, Devotion, Gods, Planeswalkers.
The primary objective of this deck is to increase the mana generation but also to always have something to spend it on - namely on making creatures monstrous and activated abilities of gods and their weapons.
CARD SELECTION
The deck uses Elvish Mystic, Sylvan Caryatid and Burning-Tree Emissary to mana ramp into early big creatures.
Xenagos, the Reveler - Uses +1 to mana ramp, while his other abilities can help to flood the board with creatures.
Domri Rade - Uses +1 to gain a card advantage and to ensure that mana is always able to be spent on a creature.
Arbor Colossus - Monstrous is especially good to give support against fliers.
Ember Swallower - Monstrous can cripple an opponent with few lands and with the support of mana ramp cards can allow for a quick finish.
Nemesis of Mortals - In a creature heavy deck this card is great, monstrous can make it a 10/10 and in the late game this creature can be quite inexpensive.
Kalonian Hydra - Apart from from being a very fast clock, it can double the counters on anything that is monstrous (as if they weren't big enough already).
Rubblebelt Raiders - Both the counters and devotion of this card make it a good fit. The fact the the counters are added for each attacking creature can mean that several counters are added per turn.
Nylea, God of the Hunt - The massive amount of devotion in this deck allows for Nylea to be readily materialised. Her trample is excellent to force damage through from the huge creatures. Spare mana can be used to pump.
Purphoros, God of the Forge - While there is less red devotion, Purphoros can still be materialised very fast. His passive is great in a creature heavy deck. Spare mana can be used to pump.
Scavenging Ooze - This card has good synergy in the fact that spare mana can be used to add +1/+1 tokens. Additionally, it can be used to clean up graveyards of unwanted cards.
Boon Satyr - Very powerful 3cmc card, additional mana can be used to bestow it. Flash allows it to be cast at instant speed for some good combat tricks.
Bow of Nylea - The bow is very flexible and can offer answers to a wide variety of problems.The +1/+1 counters can combo with the hydra, the death tough can make even the elves strike fear into an opponent, life in a tough situation and the ability to dispatch 2 toughness fliers.
Hammer of Purphoros - The hammer can speed up the attack with global haste and the golem tokens can help stabilise after a board wipe or to finish the match.
Lightning Strike and Mizzium Mortars are used for spot and board removal respectively.
Clan Defiance - this card is great at clearing out fliers/creatures or in the late game can be a win-con.
This deck is composed of cards I actually have. I will also include suggested cards or those that I plan to buy in the maybe board.
The deck loses some consistency with all the singles but as most of them are legendary this eliminates the possibility of having dead cards in hand.
I am still working on the sideboard and am always looking for suggestions on how the deck may be improved. Please post you comments below.