Once in play, Tasigur's activated ability for four mana allows its controller to mill two cards, then return a nonland card of an opponents choice from their graveyard to their hand
Grading is important for any card thats potentially valuable
Still, its a nice time to grab a Yarok or similar if you fancy a new build
The Game Changers list has a similar function, though: These cards are powerful enough to completely turn a game around, so most brackets restrict how many cards can be included from the list
But you are also obviously rewarded for building a deck with many speed cards, or for pairing an expensive powerhouse like Samut, the Driving Force with openers like Burnout Bashtronaut or Amonkhet Raceway
One thing Ill mention is not to overlook playing your commander with only one or two creatures if you know you can play more and flicker it again