Based on the latest market prices tracked on TCG Stacked, Spark Rupture is worth about $0.14 USD for a regular copy and $0.15 USD for a foil copy
The legend tells us the term "impulse draw" came from this card: Impulse Draw is a mechanic mainly associated with red decks that lets you exile the top cards in your deck and cast them for a limited period of time (example: until the end of the current turn, or until your next turn)
Quite rightly, Clive is dominant here, featuring on two different legendary creature cards as well as being name-checked on a land card of his hideaway
These usually take the form of a small number of Goblin creatures
This speeds up early to mid-game plays, as you can cast any Hydra you want for cheap while you spend your mana ramping up into big-mana territory
Phyrexian Revoker 7/10 A decent filler card that can become something you actively want if you are facing specific known nasties such as Pernicious Deed or some combo like Painter's Servant / Grindstone