Jump Scare Zimone, Mystery Unraveler helms this Duskmourn Commander Deck, and can allow you to cast big spells face-down until the moment comes for them to pop up (like a Jump Scare , get it?)
Karmic Guide is similar in its use: it can be a decent card to take advantage of some mild graveyard effects, or it can be made part of a combo
Were gonna shake them down and get to the bottom of this investigation, with the best deck on top
On the face of things, Yedora seems like a relatively mundane ramping creature
There are certainly decks where it can be backbreaking, such as many of the white aggro decks or against Master of Waves
If your deck has other 'prevent damage' cards, this creature can get really big every time someone attacks you, or act as a deterrent for you to be attacked