Legal in Legacy, Vintage, Commander, and other Eternal formats, these cards are an exciting way to celebrate the epic stories of Middle-earth
The other option is to take advantage of the direct damage, which is good in its own right to either finish off a damaged character or get them within range to be banished but also works with the likes of cards that benefit from being damaged - such as Scroop, Backstabber - that benefit from healing damage, like Rapunzel, Gifted Artist, or from damage being dealt: like Beast, Relentless.
The cards most exposed are the competitive only staples from those four sets, the ones whose price leaned on Standard demand rather than collector appeal
Add to this the Evasive keyword meaning that only other Evasive characters can challenge this card and Dr
Before you ask, yes, this version is shiny
If the target creature is an illegal target as Sin's last ability tries to resolve, it won't resolve and none of its effects will happen