One can argue Liliana, the Last Hope is a good example of how to do it if you want to do it, having card advantage both on her plus (in the form of removal) and minus (see also, domri rade), but both being restricted in what they can target or when they can be activated safely, while Teferi, Time Raveler is a bad example, having a minus thats unconditional card draw AND half a removal, and the right choice to pick in 95% of situations
Read More: New MTG Fallout Spoilers Debut Insane Aura Typal Spells!
Not only does their fusion card, Dark Flare Knight, not have their combined 4300 attack points, but Dark Flare Knight has 300 fewer attack points than Dark Magician by itself
In other words, core sets allow Wizards of the Coast the ability to curate the Standard format significantly more than typical Standard-release sets