reparations mtg card [Mirage] – Citadel Whenever an opponent casts a spell that targets you or a creature you control Reparations | Magic: the Gathering

Enchantment - Saga Sheoldred, Whispering One Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.) At the beginning of your upkeep, return target creature card from your graveyard to the battlefield

Mana and card draw are the most important resources in Magic, so getting both from one trigger plus whatever rewards you get for sacrificing your creatures is a massive advantage

There are a few staples that any Elf deck will love like: Elvish Archdruid Elvish Warmaster Overwhelming Stampede There are several high-power spells in the deck too, like Heroic Intervention and Asceticism to keep your creatures safe, and Genesis Wave to turn your mana into even more creatures

It's annoying and pervasive, but I don't think it rises to the power of the Top Ten, because, well, Slivers are fun, right