Piko Blade Armory

Chat, Open Armory is hilarious. I mill a ton of 1-cost weapons into my discard pile with Crate Rat Kurobo and Black Jade Pawnbroker, then Open Armory slaps THREE of them onto Black Jade Deathdealer at once. Add Piko of Thousand Blades for +3 more and one swing does half their life!

Deck

Dump blades into the trash, then suit up one giant attacker with Open Armory.

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Early turns
Play Crate Rat Kurobo on turn 1 before any weapon hits the pile so it mills 5 instead of 3. Black Jade Recruit and Pawnbroker keep digging up daggers.
Middle turns
Stick Black Jade Deathdealer or Black Jade Crewleader, then cast Open Armory to equip three 1-cost blades from the discard pile — Deathdealer turns into a monster.
Closing
Pay 3 IKZ with Piko of Thousand Blades for another +3 attack on that armed guy. Mastersmith Yamada swings for 4 once 6 weapons are in the pile, and Surge Gate replays a blade every turn.

I keep Crate Rat Kurobo or Black Jade Recruit with a 1-cost weapon and a 2- or 3-cost body. Send back all-weapon hands with zero bodies.

Equips up to 3 weapons with combined cost 3 or less straight from my discard pile. Let it cook.
Gets +1/+1 while holding two or more weapons, making it my favorite Open Armory target.
3 IKZ gives an equipped Garden entity +1 attack per weapon in my discard pile, up to +3.
Mills 5 cards on turn 1 when my discard pile has no weapons yet.
0/3 Defender that pays 1 IKZ (even as a Response!) to equip a 1-cost weapon from the pile onto itself.

Killing Song makes me discard a card on play: pitch an extra weapon you aren't swinging with so it fuels Open Armory and Piko of Thousand Blades.
Only pay the 1 leader health on Black Jade Dagger when that attacker is actually connecting this turn.
Mastersmith Yamada has Gate Power 2, so portaling him through Surge Gate replays Tenshin!