Start with Deckbuilders Toolkit, MTG Origins

[metalerna]

Hello, I am relatively new to MTG, I played a bit on my tablet and decided to get myself some cards. I got the Magic Origins Deckbuilders Toolkit (en) and tried to build my first deck.
Can you have a look at it and tell me what you think?
[deck="Rot-Grün"]
1 Flamespeaker's Will
1 Gore Swine
1 Dragon Grip
1 Colossodon Yearling
2 Frontier Mastodon
1 Shivan Dragon
1 Terra Stomper
1 Heir of the Wilds
1 Elvish Visionary
1 Zendikar Incarnate
1 Fiery Impulse
1 Ambush Krotiq
1 Ainok Guide
1 Wild Slash
1 Ravaging Blaze
1 Circle of Elders
2 Titanic Growth
1 Revealing Wind
1 Abbot of Keral Keep
1 Fiery Hellhound
1 Whisperer of the Wilds
2 Sabertooth Outrider
1 Scaleguard Sentinels
1 Sigiled Skink
1 Trumpet Blast
1 Arc Lightning
1 Chandra's Fury
1 Hewed Stone Retainers
1 Bathe in Dragonfire
1 Akroan Line Breaker
1 Desecration Plague
1 Might of the Masses
1 Magmatic Insight
2 Rugged Highlands
11 Mountain
11 Forest
[/deck]

I also upload my Cardscollection that I got in my Toolkit, maybe you have any suggestons to build a second deck, maybe different colors.

[G. Moto]

The deck itself doesn't look too bad but it does have some areas of improvement. I've noticed a lot of different effects but none that really work in unison with the other creatures and spells in this deck. I want to help you improve on this deck build because rarely are decks that are purchased out of a box "game winners". If you can upload this list onto the deckbuilder section of this website then i'll be able to help you better with this. Just send me the link once you have it uploaded and I'll get back to you.