The beauty of the card is in its flexibility, though: you can build in packages of artifacts, enchantments, or the like, and power them out with a well-timed Umori play, giving you a lot of options that a companion brew just wouldnt offer.
The cards ability can be activated, unusually, on your opponents turn (albeit just once per turn!): when your number of Life cards reaches 0, you can add 1 card from the top of your deck to the top of your Life cards though you must then trash 1 card from your hand
I dont remember anyone even abusing this with the various enchantment synergies of the set
The Mono-Black Aristocrats These black death trigger staples are key parts of sacrifice and aristocrats decks, but theyre easily portable into lifegain decks in various color combinations
There are also scaling threats that get stronger with each discard