This deck looks good but i would add more spells which say Target creature can't block this turn, because after play testing it, i found that this deck is vulnerable to decks that swarm with creature because most of your creatures have 3 or less health.

I would trade Magma Jet out for Lightning Bolt.

IndianBrahmin, I took your advice, although Assault Strobe does allow all damage to get through most of the time

Crimson Wisps maybe

frogkill45: I mean I had it in here before, but there isn't really anything I'd want to cut for it. Break Through the Line already has haste covered and it gives me unblockable. And everything I have is power 2 or less, so as long as it's activated before buffs, you're swinging in with hella unblockable infect. I already have card draw through Manamorphose and that's pretty much free.

biggest problem is the remove in modern, and in response to you activating the enchant they will path/bolt whoever. i run Apostle's Blessing pay the life give it protection which can get it past blockers.

why no zero drops like Mutagenic Growth Gitaxian Probe or Noxious Revival

I mean they're good, but in all honesty, unnecessary to win with this deck. It's a lot easier to win with than you'd think. If anything, I'd stick a few Noxious Revival in to stack my Manamorphose card draw, bring another Manamorphose or something else back to draw and play once the card draw goes through. That way, I can get a few more creature activations and maybe bring back a Titan's Strength or Brute Force for more damage.

Can you win without having the combo Tainted Strike + Assault Strobe against competitive decks ?

And personnaly i stoped playing infect because a single inquisition or thougtseize could rekt your whole game. It's even worse for you because you rely on some kind of infect combo ? Tell me if im wrong but it seems kinda risky according to me.

Nova Bomb

i run something like this but not only can infect win

For a more expensive version, add Inkmoth Nexus, and consider Phyresis for more consistant infect damage.

XorKoS: All you need is Tainted Strike, one or two of the creatures, and some instants. The idea here isn't to win in one turn, if you don't have Kiln Fiend. The other instants provide big enough buffs and at a cheap enough price, that Assault Strobe isn't always necessary. And as far as the thoughtseize/inquisition thing goes, if it's game one and they look at my hand, it's fairly likely I won't have a strike yet and they'll just think I'm playing some weird fiend buff deck.

lagotripha: I wish I had the money to drop on a set of Inkmoth Nexus. And Phyresis isn't bad, it'd just clunk things up a bit too much I think. This deck can still win off vanilla damage is someone wipes out my Tainted Strikes, so I don't want to make it too infecty while compromising the little stability I have lol

Why not a Temur Battle Rage for that fun double strike/trample in case you don't have the assault probe? Granted by then you would need to pre buff but that doesn't seem too hard

Gemstone Mine... why even bother using other lands with a glass cannon.

Because Temur Battle Rage is 2 CMC. I don't want to spend 2 for a spell. I'd rather play another Brute Force or Titan's Strength instead. I don't think Gemstone Mine is really necessary. I may play it once I splash green for Wild Defiance but that's a ways away...

How about a Groundswell?

Maybe when I splash green, but not right now. I'm waiting until Khans rotates so Wooded Foothills price drops

What happens when someone Path to Exiles the crap out of your Kiln Fiend or other creature?

Emerge Unscathed or something similar is needed, or this glass cannon is gonna blow up before it even fires.

You're not wrong. But there are 24 creatures in the deck to go off on. That's why green splash is happening when foothills drops so I can play Wild Defiance. I know it doesn't take care of paths, but not much does, and I'm not splashing white for protection

If you're only worried about PTE have you considered Phyrexian Crusader Blood Knight Knight of Infamy Stromgald Crusader Hand of Cruelty Black Knight as sideboard options - should perform admirably in these matchups. If you're splashing green I cannot reccomend sideboarded Autumn's Veil enough for tricky blue/black (cruel control) matchups. Glistener elf is in green, which can also help alleviate the tainted strike reliance, with some testing.All these options will slow you down a little for the reliability- when you can, I'd vote for Simian Spirit Guides - (the Lotus Petal of modern), to replace those desperate rituals.All told, I can see this being very succesful in a given meta.

Between Gemstone Mine and Mana Confluence, or City of Brass I'm sure this could splash white with ease, but if you're running a tightish budget it's for sure not a great idea.

But at least add 2 more Apostle's Blessing...

Hope I could help.