yugioh mill cards YU-GI-OH! - Left Arm Offering (MIL1-EN015) - Millennium Pack 1-1st Edition Yu-Gi-Oh: 15 Best Mill Cards

Its Thick Fat ability also provides some situational tech utility against Fire and Water-type decks in casual formats

It may be that you have loads of bulk cards which you are not using in decks right now but you dont want to get rid of them just in case some of them become useful in the future

Rings of Brighthearth doesn't work with either Kaalia

There is a limitation - the artifact enters with a Finality counter, which will exile the artifact if it's ever sent to the graveyard, shutting down infinite recursion loops

In exchange, you get to search your library for a Dinosaur creature and put it directly onto the battlefield