Use self-mill or discard outlets like Faithless Looting to fuel it
Creature Bird Common Mark Brill 1/1 NOT LEGAL Standard NOT LEGAL Future NOT LEGAL Historic NOT LEGAL Timeless NOT LEGAL Gladiator NOT LEGAL Pioneer NOT LEGAL Explorer LEGAL Modern LEGAL Legacy LEGAL Pauper LEGAL Vintage LEGAL Penny LEGAL Commander LEGAL Oathbreaker NOT LEGAL Standardbrawl NOT LEGAL Brawl NOT LEGAL Alchemy LEGAL Pauper Commander LEGAL Duel NOT LEGAL Oldschool LEGAL Premodern LEGAL Predh Flying When this creature enters, look at the top four cards of your library, then put them back in any order
Either way, you can see that it's very, very hard to pull this off, and in EDH its almost impossible because cards cant have the same name
Urzas Saga will retain any of the abilities gained from its chapter abilities under Blood Moon, such as the ability to make constructs
To fit in with the block's theme and mechanics, WotC went a bit retro and brought back cumulative upkeep (though they did clean up some of the rules for it, adding age counters to better keep track of things)