Dear god.
Can you imagine how many people would forsake all of the regular
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cards, take up this only alongside Animate Weapon, and just abuse the HELL out of endless 'dual-weapon/shield' combos?
I also think that having so many shields out would invent a new deck; 'Universal Rainbow Weapon/Shield-loving Multiplier'.
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I think that having more slots is lovely, but multiple shields and/or weapons (
up to 8?!) is a just being ridiculous, and potentially hard to program if you already have multiple weapons out (what would happen if you filled all 7 weapon slots and tried to add a new one/used Animate Weapon when you have 7 weapons out?).
This also doesn't help Air's weakness to permanent control either, and would actually give False Gods/other control decks more of a reason to use those permanent destroyers. (Unless you had 6 PA's...)