Casual testing: A proxy version lets you test whether your group actually enjoys the gameplay before building around the card
With the exception of "Excaliburn", all of them can re-equip to a "Noble Knight" you control when they are destroyed and sent to the Graveyard, so that even if you Special Summon a Extra Deck "Noble Knight", by using materials that were equipped with "Noble Arms", those Spell Cards will re-equip themselves to that new monster
In Limited, I can see it being a nice pick in draft
I won't pretend that it's great, but the idea of beckoning an Eldrazi from the Blind Eternities sounds kind of awesome
Furthermore, each commander can return lands from your graveyard to your battlefield, just like Worldsouls Rage
Ok Archeops [Holo] #147 (Pokemon Silver Tempest) Details All prices are the current market price