First of all, I see no reason for your lands to produce black mana, you could easily replace the Godless Shrine with a Plains and it would do much better (no coming into play tapped). You can replace all the W/B mana symbols with white ones (in your head). As for the Dragonskull Summit , you could try putting either a Plains or a Mountain , but I could see why you need to keep it in.

Also, you should try cards like Indestructibility on your Boros Reckoner because indestructible creatures can still take damage.

Hope this helps! :)

Thanks for the comments. im kind relying in boros charm and the frontine medic for the indestructible engine. And it has been working amazingly im my test plays against my other decks. But i just got the medic and i still haven't played with this deck for real.

I think you misinterpreted what I said when I said that black mana sources are not useful in your deck...

I meant not to take out Immortal Servitude and Gift of Orzhova , but to just take out the Godless Shrine ... I think that Immortal Servitude is good for after your Boros Reckoner dies, its just that there's no point in having black mana SOURCES in the deck because any black mana could be easily replaced by white mana sources

I know, just trying out some other possibilities. Gift of Orzhova and Immortal Servitude are working weel gainst aggros. But the Ring of Valkas is being really helpfull to activate Firemane Avenger 's battalion.

Also, im thinking albout adquiring Elixir of Immortality (against Mill decks) and Rest in Peace against cemetery casters.

Elixir of Immortality doesn't really help against against mill decks because even though you get ONE more card in your library, I think that Kozilek, Butcher of Truth would do a much better job. The only problem is if you draw him.

But Elixir of Immortality does shuffle your graveyard into your library and you get to choose when, Kozilek, Butcher of Truth has to die to trigger the shuffle, plus the elixir is really cheap to cast.

I would recommend running more Legion Loyalist instead of the Truefire Paladin