Wilds of Eldraine

Hopeless Nightmare | Enchantment | | When Hopeless Nightmare enters the battlefield, each opponent discards a card and loses 2 life. When Hopeless Nightmare is put into a graveyard from the battlefield, scry 2. {2}{B}: Sacrifice Hopeless Nightmare. | Dominik Mayer

Not Dead After All | Instant | | Until end of turn, target creature you control gains "When this creature dies, return it to the battlefield tapped under its owner's control, then create a Wicked Role token attached to it." (Enchanted creature gets +1/+1. When this Aura is put into a graveyard, each opponent loses 1 life.) | Randy Vargas

Rat Out | Instant | | Up to one target creature gets -1/-1 until end of turn. You create a 1/1 black Rat creature token with "This creature can't block." | Michele Giorgi

Warehouse Tabby | Creature | Cat | Whenever an enchantment you control is put into a graveyard from the battlefield, create a 1/1 black Rat creature token with "This creature can't block." {1}{B}: Warehouse Tabby gains deathtouch until end of turn. | Steve Prescott