Femme_Fatale I think Hell's Thunder is the better of them since it has unearth and flying. Lightning Serpent could be really great when you have much mana though.

Volcanic Fallout instead of Anger of the Gods . Reason is because Anger of the Gods directly contradicts with Athreos, God of Passage . That and it is instant speed.

Femme_Fatale & benjamin_is_nuts
Thanks for the suggestions, I will make some swaps and see if it works out well.

Femme_Fatale, benjamin_is_nuts, Pseudolife.What do you think about adding Cavern of Souls to this deck? Because I have 15 elementals in this deck now, so maybe that is a possibility.

Duck_of_doom ...and you have 13 non-elemental creatures which is about 46 % of the creature base. I.e Cavern of Souls is too risky and counterspells isn't the biggest problem for this deck.

It wouldn't be a big issue if your other creature base wasn't one of these two: 1) Coloured mana heavy and 2) Not a single one shares a subtype.

And that's 2 for 2 bud.

Have you thought about swapping Butcher with Falkenrath Aristocrat?

Krakshot well I have no humans to use as sacrifice outlet to Falkenrath Aristocrat and a important thing with butcher is that it's out of Lightning Bolts range, I still like the card I just don't think it's better than butcher in this build
WotanubisReturned Grim Haruspex and return to the ranks are both to slow for modern. Memnite/Ornithopter - I see your point but it aint a direction I would like to take with this deck. Regarding Viscera Seer, it may work well here but what would I remove to make room for it?
Anyways, thanks for the input!

You can respond to the Lightning Bolt by using Falkenrath Aristocrat's sac ability. It still makes her indestructible though she wouldn't get a +1/+1 counter. I do like the butcher but he requires sac'ing two creatures to really be effective on the first turn he's dropped.

How does Athreos, God of Passage interact with Leyline of the Void and Rest in Peace ? If those graveyard replacement effects cause Athreos not to trigger, what enchantment removal would you reccomend for this deck? Also have you considered Lightning Skelemental since rev 12?

What would you think of Cruel Celebrant instead of Blood Artist ? Same CMC, better stats. shouldn't be a problem in your case as you're playing Mardu either way.

@-blink-: I'm not sure how Athreos interacts with graveyard hate, but I think Mortify or simple Disenchant would be good sideboard cards in case of troubles.

rotimislaw & -blink- According to this thread athreos is punished by RIP and leyline.
Both Mortify and Disenchant are sideboard viable so I could make room for those. I haven't really touched this deck in a long time so its a bit funny to see people still commenting on it xD, it's pretty dated.
Lightning Skelemental is new to me, looks good enough to earn a spot. Maybe removing Butcher of the Horde . Idk if that's the right choice or not. Also considering removing Fulminator Mage from mainboard at least, even with athreos it may be a bit weak.