At the beginning of combat on your turn, you target a Villain you control, usually Doom himself, and it gains menace and connives, meaning you draw a card and discard one
There are also decks where you actually want artifacts in the graveyard for cards like Goblin Welder for which Thirst becomes one of the very best cards
Mono-Blue can control the table for ages, but at some point, you need a win condition
Creatures (28) 3 Magebane Lizard 4 Manifold Mouse 4 Heartfire Hero 4 Emberheart Challenger 4 Hired Claw 4 Screaming Nemesis 1 Tersa Lightshatter 4 Twinmaw Stormbrood Lands (22) Spells (10) One of Magics most accomplished and respected players, Yukuhiro adds a Pro Tour win to his already impressive resume that includes four prior Pro Tour Top 8s ( Avacyn Restored, Eldritch Moon, Amonkhet, Rivals of Ixalan ) and a whopping 10 Grand Prix Top 8s, including wins at GP Singapore in 2013 and GP Nagoya in 2018
As for Commander play, the Avatar Horror features in Winter, Misanthropic Guide and Victor, Valgavoths Seneschal, which focuses on graveyard synergies
nobody has a maximum hand size, but everyone loses life based on the number of cards in hand