The One Ring can buy you a turn and draws an increasing number of cards
As for copying spells, it allows you to copy any artifact spell by just paying 1 extra mana, which is sick, but you have to be aggressive to build up to max speed
Basic Split Cards For example: Fire // Ice
A Sirens Lookout that was a 2/3 Flying on turn 3 could dominate a game by itself, while a 1/2 Flying barely impacted the battlefield (despite drawing you a card)
As a four-mana aura, its good that you can technically use it in a fair way, slapping it onto something as a response opponents removing a different creature (or wiping the board)
The deck was light on card advantage of any sort, so this gave me a way to convert one resource to another, and it could also sacrifice a Rot Farm Skeleton to activate it again to fill up my graveyard