I've seen a lot of recent hubbub over the fact that Burn is still heavily represented, and frankly yes, that's going to be the case, especially on MTGO leagues, because the deck is fast, but realistically, the deck's overall power level has seemed rather just fine since the bannings
Once per turn, during your Main Phase or your opponent's Battle Phase (Quick Effect): You can target face-up cards your opponent controls, up to the number of "Gunkan" monsters you control Special Summoned from the Extra Deck
cards, the value of Armory Arm depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Hidden Arsenal: Chapter 1)
And while Gigantes cannot be summoned or set normally, you can Special Summon this Rock Monster by banishing any one Earth Monster from your Graveyard