No more Mentor of the Meek nonsense, this Modern Horizons 2 card almost single-handedly bridged the gap between old and new white decks, allowing them to compete in an age of Magic defined by mana production and card advantage
Honorable Mention #1: Assault Intercessor Putting Massacre Wurms second ability onto a much cheaper creature means Assault Intercessor is going to make a splash
Also the perfect answer for Diablo Devoted Herald but a set late
Now, it is a little annoying that you have to make sure you have at least one card in your hand all the time for the token to not die, but the upside is that you can also make it significant larger
Indeed, the only hard evidence I've got is that it'll feature the first "simultaneously co-ordinated global launch." In other words, certain markets won't be lagging behind everyone else as per most sets for one of the best card games
Inzektor Dragonfly X DARK Level 3 [ InsectEffect ] ATK 1000 DEF 1800 Once per turn: You can equip 1 "Inzektor" monster from your hand or GY to this card