The overall premise for this deck is to use your opponent's creatures against them. You can have wide open field, with no creatures, and still kill them on their turn with only three mana.
The combination with deck is looking for is Deflecting Palm+Become Immense to accomplish this. Even the weakest token can result in 7 unplanned damage that your opponent will take on during their combat.
Play Deflecting Palm first. If they allow it to resolve, then cast Become Immense. Hopefully you can pull this off without them having a kill spell or counter spell to prevent the damage.
Our objective is to spit out tokens, while still keeping mana open for a burn spell. We play Raise the Alarm at the end of our opponents second turn, giving us a potential turn 3 Become Immense on one of our soldier tokens (assuming we burned a creature with Wild Slash turn 1. This will be a quick 7 damage that goes unblocked.
If our opponent chooses to target a creature, we play Collateral Damage, sacking our creature in response and hitting them with an extra 3 damage for 1 red mana. This card also works to help us fill up the graveyard faster for Become Immense with delve.
With tokens, we can swing away with our opponent more than likely unable to block everything. We can then cast Become Immense for 1 green mana on one of our unblocked tokens and hit them with 7 damage.
Seeker of the Way will get us a ton of life, especially if we can place Become Immense on him, netting us 9 gain in life.
Atarka, World Render is our end game, with double strike, and possibly Become Immense to add to the damage.