Cards that can do this include Archfiend of Despair, Solhpim, Mayhem Dominus, and Bloodletter of Aclazotz
Competitive Brawl Ajani, Nacatl Pariah // Ajani, Nacatl Avenger Lutri, the Spellchaser Nadu, Winged Wisdom Oko, Thief of Crowns Old Stickfingers Ragavan, Nimble Pilferer Rusko, Clockmaker Tajic, Legion's Valor Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar Wrenn and Six Though Competitive Brawl shares many features with its Historic counterpart, like 25 starting life, a commander, and a 99 card deck constrained by the commander's color identity, it has a unique ban list of ten extremely powerful, oppressive commanders
That scry turns from a 'sure, okay' to an effect you'll likely be wanting to trigger as much as possible 7 Ultimate Magic: Holy Divine Intervention Let's go back to the Wrath of God scenario
Blighting creatures has an impact on the game no matter what, with you either drawing cards or having opponents lose one life