19 cards where the text matches the regex /^destroy target creature\.$/

Blight Grenade (Warhammer 40,000 Commander #31)
Bone Splinters (Dominaria United #83)
Deadly Visit (Guilds of Ravnica #68)
Drag to the Underworld (Theros Beyond Death #89)
Eviscerate (Dominaria #91)
Fierce Retribution (Innistrad: Crimson Vow #13)
Final Payment (Ravnica Allegiance #171)
Hagra Mauling // Hagra Broodpit (Zendikar Rising #106)
Hagra Mauling // Hagra Broodpit (Zendikar Rising #106)
Impale (Rivals of Ixalan #76)
Lash of the Balrog (The Lord of the Rings: Tales of Middle-earth #92)
Lethal Sting (Hour of Devastation #67)
Mob (Modern Horizons #97)
Murder (Murders at Karlov Manor #95)
Murderous Cut (Khans of Tarkir #81y)
Mutual Destruction (Ikoria: Lair of Behemoths #96)
Price of Fame (Murders at Karlov Manor Commander #135)
Start // Finish (Amonkhet #215)
Terminal Agony (Modern Horizons 2 #215)
Unholy Hunger (Ultimate Masters #120)

Though this query has ended, its relics still slumber in New Argive.