So who is your Commander? Because you've got all 5 colors of planeswalker, but no 5 color-cost creature.
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Once they realize what this deck is about, or if they have more combo-based decks, they'll take advantage of Maralen and end you more quickly than you can stop. Watch that card. Doom Blade/Go For the Throat/Murder would be nice. Terminate would be better than those. Blue has plenty of field control. Cruel Ultimatum would be good too, if you expect long-lasting games, which you should since it'll be five people.
Take out one or two hypersonic dragons and put it 2 more pillar of flames.Dispel is fun with your own instants and guttersnipe, but they're less useful against other (non-izzet) decks.
Slumbering dragon is also a mono-red 3/3 chump blocker with flying for a mana. Delver beware.
I feel like if you really want to run Inexorable Tides (I'm guessing based on the deck name), you should run lots of one-mana throwaway creatures with infect or counters, like Fume Spitter.
I've noticed this Gzapge guy going on all the top liked decks and saying "Your decks are terrible," so I think he's trying to troll. Great deck, by the way. Good luck with it, should you be using it.
Very slow. No deck searching could mean all equips and no creatures. Or all equips/soldiers and no land. No means to get back cards from OB ring or graveyard. Honor of the Pure is kind of silly when you make a (semi)tribal deck since Coat of Arms is around (assuming this is a casual deck.) I suggest putting some Kor or Cat soldiers in, since they work well with equipment.
Lol @ Mishra's Workshop x4
More of a theme. I'm not really into tournaments or anything. I really just used Innistrad and M12 and other recent cards due to availability.