Some are mechanically twisted, like the one that instructs another player to tap someone's father, or the one Charlie 'MoistCr1TiKaL' White plays that lets him make a copy of any card he can think of, but many are just funny, juvenile gags
Rules 02/01/07 If a spell has multiple targets but is targeting the same thing with all of them (such as Seeds of Strength targeting the same creature three times), you cant target that spell with Imps Mischief
Drawing cards is strong, but you can also use this to permanently remove an important combo piece from the game by exiling a tutor target and never casting it
Is it exhausting whenever your opponent responds to your spells with some sort of defensive measure
Many dragon-based decks are already able to amass a punishing engine with the likes of Sarkhans Unsealing, Dragon Tempest, and Scourge of Valkas