We'll cover the features, usability, whether or not they're still kept up with by the developer(s), and more
Obviously, Clive comes with some risk, which may make it played less, but it could be ok
Tutors themselves break a fundamental rule of most card games , which is that you're at the mercy of the cards you draw
The closest equivalent cards are: Dodge and Second Wind
In the OCG, this is replaced with an OCG-only Quick Effect of Numeron Wall, where it can be sent from the hand or field to the Graveyard while the controller controls no cards, and activate a Numeron Network from the hand or deck
Whether you were trying to jam Goblin Rabblemaster on turn two or you were ramping towards elite haymakers like Dragonlord Atarka, Elvish Mystic remained the best possible turn one play