Maybe your playing partner just used one against you and youre wondering if the play is legitimate - after all, youve never even seen one of these before
When Wizards of the Coast was printing the first test cards for Magic, they didnt have art, so I told them to get any art they could, even if it was just random clip art
Both are go-wide mechanics that want you to play a high creature count plus a few ways to support them
I am just playing Cut Down and Withering Torment to help me stabilize, and Withering Torment can be used in a pinch to save yourself from an expiring Archfiend or Pact stuck on your side of the board, or to remove an already-donated Greed's Gambit to have your opponent sac 3, lose 6 life, and discard 3 cards
No matter how you squeeze it, if you have more access to cards than opponents, you have a major advantage