4 of lightning strike, Magma Jet, and at least 3 of searing blood mainboard. Also mainboard either young pyromancer or satyr firedancer

I was actually looking to include young pyromancer but I wasn't sure. The main problem with the deck imo is it has problems when I comes to artifacts and enchantments. Any suggestions.

Enchants are a problem when it comes to red but Vandalblast would work for artifacts

I agree Vandalblast as a side board also if enchantments are a problem try Ratchet Bomb it can also take care of planeswalkers and creature tokens. I'd also suggest -1 Chandra's Outrage and +1 Chandra, Pyromaster -1 Scouring Sands +1 Magma Jet

also maybe try - 3 Splatter Thug +3 Ash Zealot to speed it up a bit.

Ok thank you guys for the help

In my opinion, mono red burn standard definately doesn't work... try boros aggro which is much better... and by the way, if you're keeping the deck, I'd suggest you put those Vandalblast on your sideboard since your opponent may not have any artifact in his deck so this card would be useless...Chandra's Outrage is way too expensive for what it deals...I'd put 4x Searing Blood and remove the Flames of the Firebrand since it's very expensive and put some Molten Birth to combo with Young Pyromancer AND definately Purphoros, God of the Forge (2x) on your sideboard to combo with Young Pyromancer + Molten Birth ...Definately 4x Chandra's Phoenix and 4x Satyr Firedancer , and one more Young Pyromancer AND as long as you have Satyr Firedancer , I'd suggest you get at least one Lava Axe ...

Hey guys I have made some changes to the deck but have increased the number of cards do you think 70 cards would make this deck to slow

60 ~ 61 cards, no more otherwise you'll have some problems with your mana

Burning Earth, stormbreath dragon?

I didn't include those 2 cards because imo they aren't that great and I see little use for them mostly because where I play fnm almost everyone runs mono black or mono blue devotion and seldom do they. use non basic lands and the dragon costs too much and is too demanding for my deck I mean 7 mana for monstrous I don't want a card in my deck that costs so much and has a one turn effect on it I do understand that with evasion and haste it makes it a good card but as I said the mana cost is just to much.

Red / White burn is a bit better, more resillient due to some life gain and access to more powerful spells like Boros Charm and Warleader's Helix .

Although, going mono-red is a lot cheaper because you don't need dual lands. This looks like a pretty fun mono-red burn deck :)

Yeah I wanted to keep this deck on the cheaper side but I see what you mean.

R/W Burn is cheap as well, but way better - faster and more stable. The cost is like 75% manabase 25% rest. You could easly get shocklands and temples for the price of Chandra, Purphoros or Stormbreath Dragon, that are not really needed in Burn deck (maybe a single copy of Dragon could work, but it's definitely not a must). And white gives you acess to more burn spells, instead of the inefficient creatures you use right now.

Flame-Wreathed Phoenix is too slow. Remove them for 2 more Chandra's Phoenix .

Guttersnipe is truly inefficient. It could only work in counterburn decks, since they have cards to protect him. Otherwise he just dies on the spot or you get 1 trigger off, especially when pretty any deck has acess to some kind of removal in current standard.

Young Pyromancer is okay for specific meta, where there are lot's of creature decks without much acess to removal. Try Ash Zealot or Eidolon of the Great Revel instead. These dudes are top notch cards for this deck.

Satyr Firedancer - only sideboard against creature heavy decks. Is pretty a dead card vs UWx controls and even Black Devotion (removal).

Chandra, Pyromaster - sideboard against control and other grindy matchups, where you need sort of card advantage for longer games.