Unfortunately, you have to pay mana every time you want to draw a card, but if your hand is empty or close to it, this mana cost is often worth it
Or I could drop a Karn, the Great Creator that blanks all your artifacts' activated abilities
Thats great value, and this card can be a staple control card in formats like Standard and a worthful addition to Jeskai decks in general, not only dragon-based ones
On the off chance this set card gets destroyed, you can draw your Harpie's Feather Duster from your Deck or Graveyard
As such, there are plenty of different decks when it comes to each Type
You could let the opponent draw a card after removing their Creature if you want to soften the blow, or you could give that draw to another opponent (great in Archenemy situations)