For three mana, it allows only you to draw a card, not giving your opponents anything
If you want something blunt and simple, try Brad Nelsons Abzan deck.
It just durdles around until one of your opponents shows you their Eldrazi
Yennett's ability to cast spells from the top of the library rewards careful manipulation of the top cards and allows for powerful, unexpected plays
I simply open it up and look. 3/2 Illustrated by Seb McKinnon Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
The ability is a black-red mini-theme and it shows up on one mono-black card (Dread Wanderer), two mono-red cards (Hazoret the Fervent and Thresher Lizard), and one black-red card (Neheb, the Worthy)