So, on top of a Monster Reborn and a super search card, Malefics get a card to make them actually usable together.



20TH-JPC16 Sin Territory (Malefic Territory)
Continuous Spell Card
(1) When this card is activated: You can activate 1 “Malefic World” from your Deck. While the card activated by this effect is in a Field Zone, neither player can target cards in Field Zones with effects.
(2) The “There can only be 1 face-up “Malefic” monster on the field” effects of “Malefic” monsters become “There cannot be face-up “Malefic” monsters with the same name on the field”.
(3) During the Battle Phase only, the effects of “Malefic” monsters are negated.

Source: https://twitter.com/i/web/status/1086956508275924993