mtg commander 2017 vampire deck Magic the Gathering SET card decks Commander 2017 Review: Vampiric Bloodlust

Umbris has a huge wall of text, but all it does is exile the top card whenever it or something else enters the battlefield and it gains +1/+1 for each card your opponents have in exile

As certain sets or letters fill up a cell in the sorter, I move them to a BCW storage box and use index cards to temporarily separate the sets

Its use in Reanimator strategies puts it over as a broadly powerful Cube consideration for me

Setting aside your ability to improvise to get it onto the battlefield (hello Smothering Tithe), the fact that it just keeps getting bigger whenever you have an artifact enter the battlefield means its going to get immenseand its not like itll lose the counters

Sacrifice this artifact

you instead have to wait until your next end step before you get to use it