A characteristic of such cards is that it has an ability that can't be easily replicated, or it gives a huge benefit for a lop-sided cost
1-Mana Cantrips Renegade Tactics Ancestral Anger Warlord's Fury Rile Telim'Tor's Edict Crash Through Crimson Wisps Expedite Overmaster Might of the Meek Impolite Entrance You can run these for their main effects, but theyre generally slightly sadder versions of Opt and Consider for spellslinger and storm decks
For example, if you control a creature with a tap ability, you could activate that ability in response to an opponents spell or during combat, even on their turn
Like any Continuous Trap, Mind Drain has to be Set in a previous turn to be used, so its benefit won't be immediate
I know some will say that Archfiend Black Skull Dragon is superior to this card but I'm the kind of guy who feels you can't replace the originals, especially this one with its awesome design that few others have matched