mtg when an opponent draws a card Psychic Possession | Dissension | Modern Cards that let opponents draw

These cards will often be rares and mythic rares, but anything that puts your opponent on the back foot will fill this role well

Sorin, Lord of Innistrad The good thing about Sorin is that you get a cheap, 4-drop 'walker with a solid long game

after casting their one-time effect"

In the Arena update that revealed Kraza, we also got to see the Through the Omenpaths take on the Soul Stone

Additionally, Olivia Voldarens abilities to change a creature to a vampire then steal it, is a long winded, but effective way of getting rid of creatures you dont want your opponents to have

I also exclude most creatures that care about snakes or mention them, but arent snakes themselves and made a pesky exception