Teferi, Time Raveler is the same way, as his passive power prevents players from casting instant-speed spells the moment he touches the table, preventing counterplay at a very early turn: as early as turn two if you can get some quick one-cost mana ramp out turn one
Damping Sphere is a really good counter against Storm decks and big-mana decks like Tron and Amulet Titan which place down lands that can sometimes generate 2 or even 3 mana
Pokmon card not included
Thus a card that dominated the formats it was legal in or has regular play in Modern or Legacy like Atarka's Command, Wild Cantor, Burning-Tree Emissary, Huntmaster of the Fells, Manamorphose, or Bloodbraid Elf, would still need to prove it's chops at the kitchen table
The token copy of Goblin Glasswright will enter prepared as a 1/1 green Frog creature, but the copy of Craft with Pride in exile will still be a red sorcery