This works specifically, whenever you cast instants or spells on a creature you control, allowing you to exile the card after resolving it, instead of putting it in your graveyard to then be put back into your hand on the next end step
Youll obviously want cards that allow you to scry repeatedly, like Gandalf, White Rider, Jace, Mirror Mage, and The Temporal Anchor, but ways to get big spells on top of your library for exiling like Brainstorm and Mystical Tutor are also essential
The great thing about Demonic Tutor is just how cheap it is , and it makes playing whatever youre searching so desperately for much, much easier
While is pretty steep for a 5/3 creature, when it enters, its first chapter destroys target creature a foe controls, its second chapter is the your foe loses the game one, which is obviously awesome, and the third chapter draws you two cards and forces all players to lose two life