The normal version of this card was released in the high-sea sailing set Azurite Sea but this card came in a collection that was released before the set was even announced
While these cards are less effective defensive spells than Immolating Glare both can hit blockers making them much better midrange cards and viable in aggressive decks
The first is Aragorn and Arwen, Wed, a Human Elf Noble that cares about +1/+1 counters and gaining life in true white/green fashion
There may be some deckbuilding tension at some point between effects that are maximized by sacirificing him, sure, but in a 100-card singleton format, that limit will be difficult to determine and it feels that we arent quite there yet
While there may be similar cards with individual advantages, such as Emrakul, the Aeons Torn for its game-ending power or Kozilek, Butcher of Truth for card advantage, Ragnarok's versatility and potential to generate value consistently make it a strong candidate for certain strategies, particularly in midrange or control decks where its varied abilities can be effectively leveraged