Discard spells (such as Thoughtseize, Inquisition of Kozilek), cantrips (such as Serum Visions, Opt), countermagic (such as Mana Leak, Force of Negation, Drown in the Loch) or even removals (such as Fatal Push, Lightning Bolt, Kolaghan's Command, Drown in the Loch) are checking and slamming the battlefield
That's powerful stuff
Keep in mind the game is still in closed beta so everything is still subject to change
Game Plan If you're one of the vast majority of players who can't or won't pay over $2,500 USD for a Timetwister but want the effect, then you'll be happy to know that Game Plan is a super cheap alternative
Since these both draw on ETB instead of on-cast like traditional enchantresses, you can also do all sorts of flicker tricks to maximize your card draw