Murders at Karlov Manor

Connecting the Dots | Enchantment | | Whenever a creature you control attacks, exile the top card of your library face down. (You can't look at it.) {1}{R}, Discard your hand, Sacrifice Connecting the Dots: Put all cards exiled with Connecting the Dots into their owners' hands. | Aaron J. Riley

Expedited Inheritance | Enchantment | | Whenever a creature is dealt damage, its controller may exile that many cards from the top of their library. They may play those cards until the end of their next turn. | Micah Epstein

Blood Spatter Analysis | Enchantment | | When Blood Spatter Analysis enters the battlefield, it deals 3 damage to target creature an opponent controls. Whenever one or more creatures die, mill a card and put a bloodstain counter on Blood Spatter Analysis. Then sacrifice it if it has five or more bloodstain counters on it. When you do, return target creature card from your graveyard to your hand. | Jokubas Uogintas