I just started playing again in RTR. I've played on and off the last 15 years. I'm not a complete newb, but the meta eludes me a little. Looking for help with my JUND-fu, below.

http://deckbox.org/users/elpablo
http://deckbox.org/sets/326292

I'm all traded out and purchasing cards aren't an option right now. So, what you see is what you get. I'm looking for critiques. I have some other cards that could certainly go in. Please look at my profile and make suggestions (I want to hang onto the Simic cards, I feel there's a deck there at some point).

Rakdos's Return is one card I'm considering swapping (for say sever the bloodline). I would say though I'm a little confused on how to play Return in the deck. Is it a finisher? Do i play it as soon as possible to whittle down their options/advantage?

3 Blood Crypt
3 Dragonskull Summit
3 Evolving Wilds
3 Forest
2 Kessig Wolf Run
3 Overgrown Tomb
2 Rootbound Crag
3 Stomping Ground
2 Woodland Cemetery

4 Deathrite Shaman
4 Thragtusk
3 Huntmaster of the Fells
3 Olivia Voldaren

3 Pillar of Flame
3 Abrupt Decay
2 Dreadbore
2 Tribute to Hunger
2 Mizzium Mortars
1 Bonfire of the Damned
2 Sever the Bloodline
4 Farseek
2 Garruk, Primal Hunter
1 Staff of Nin

#60

Sideboard:
3 Duress
1 Grafdigger's Cage
2 Devour Flesh
2 Rakdos's Return
2 Slaughter Games
2 Vraska the Unseen
3 sideboard?
#12

added decklist in post

Does my version of this popular deck measure up, even with the substitutes I have to make?