Broodmate Dragon is very good at these tasks, because you get not one but two independent good creatures capable of dominating many boards on their own
So long as you have a means of reliably returning lands from your graveyard into play as well as sacrificing lands as needed, you can make Glacial Chasm the bane of your opponents' existence
A creature or planeswalker on your opponent's side is gone just by casting 3 black mana, then you can turn around and exile this creature to get a Zombie token in return
I call this a watershed card because if this is the power level Wizards are aiming at for aggro, and people are still set on not playing sweepers, hatebears, or stax-lite, then yeah, this has quickly turned toward a turn 6-7 format
If you know the basics, but want to check out a different way to play than the Standard format, take a look at our How to Draft in Magic: The Gathering guide