But even like original cards, proxy cards can be precious for players
Whenever the controlling player is dealt combat damage, it forces each opponent to sacrifice a creature that dealt combat damage that turn, before the Ring tempts the player
(Note that these are not official terms for the design, different terms for these Holofoil patterns are in use in the community)
While some decks will rely on spells like Rampant Growth for land ramp, its very common for green-heavy decks to focus on mana dorks like Llanowar Elves for ramp
Cold-Eyed Selkie Cold-Eyed Selkies made rounds in EDH since the dawn of the format, punishing anyone foolish enough to play islands in their deck (youre not getting out of this one easy, Hallowed Fountain)
Toss in some Legacy play and consider that the infamously low supply Coldsnap is the only real printing of Counterbalance (there's also an Amonkhet Invocation), it doesn't take that many players buying a playset for the price to rise