curse cards mtg of Obsession [Innistrad: Midnight Hunt Commander] they lose 2 life and you gain 2 life All 42 Curses in Magic

Maybe it could come off as a Game Changer, but theres a lot of apprehension around releasing a card of this power level back into the format

With Basilisk Collar, an artifact equipment, Ragost gains deathtouch and lifelink, meaning that its ability to sacrifice a Food to deal 3 damage to all opponents actually gains you 9 life in the process (assuming all three other Commander players are still at the table)

Lost in the Maze Tapped out Lost in the Maze is a very intriguing enchantment

This increases trigger frequency while keeping combat lanes open

The ability to loop this card with a very relevant card type is why it makes my list

Zoyowa deals 3 damage to each opponent who didn't