Manufactured from metal or a similar material , they are not legal for play and their value resides in their rarity as an exhibition piece and their association with limited editions of products (e.g., Ultra Premium Collections )
When you swung with the first you could stack the triggers so the token churning happened first, and now you had 7 damage swinging on turn five, and 11 on turn six from the Hero of Bladehold alone, without any help
Theres a small amount of token creature generation and trigger copying present as well, but not enough to focus on as your game plan
Quench is definitely on the fringe side of playability in Standard
For example, in Urza's Destiny (the set where I was the entire design team), there were two different cycles that explored effects that scaled based on how many cards of a certain color were in your hand
You can use it to untap a creature and block with it unexpectedly