The elemental incarnations, and the Theros titans (such as the recent Phlage, Titan of Fire's Fury), have triggered abilities that cause them to be sacrificed after they enter the battlefield unless they've been cast a particular way
Lobotomy A mind is a terrible thing not to have
Executioner's Capsule: Somewhat limited, but with many players, someone will have a nonblack creature you want to destroy
Last week we saw the new Wilds of Eldraine commanders revealed, as well as all 10 Wilds of Eldraine draft strategies we'll encounter when WoE hits tables in two weeks' time
The key to this type of design is that you want to find as many generally useful abilities as possible in the available colors
This Pok-Power can be activated multiple times via the Super Scoop Up card from the same set that returns Jolteon ex to the players hand