(2) Once per turn, when another monster's effect is activated (Quick Effect): You can negate the activation, and if you do, destroy that monster
This can take care of a few smaller creatures, sure, but this spell gets even better when cast from exile
(Dis)honorable Mention: Strixhaven Deans This might feel like cheating since Im lumping a large chunk of these together
In other words, while it may err to the pricier side than what some may be willing to pay for a random chance at the cards, it's not so expensive that those invested can't take the time to get them, nor is it so expensive that the scalpers are eating up real luxuries like the PS5 or Xbox Series X
1 Cyberdarkness Dragon
Similarly, if you sacrifice a creature to activate a mana ability while casting a spell with convoke, that creature won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for convoke