Can I find it when I need it
You could probably guess the type of deck Jump Scare

Commander 2017 Filter: In Stock Out of Stock Show All LP - Boars Hat Direct, English 2 In Stock All variants Out of stock LP - Boars Hat Direct, English 2 In Stock All variants Out of stock NM - Boars Hat Direct, English 1 In StockLP - Boars Hat Direct, English 2 In Stock All variants Out of stock NM - Boars Hat Direct, English 1 In StockLP - Boars Hat Direct, English 2 In StockMP - Boars Hat Direct, English 1 In Stock All variants Out of stock LP - Boars Hat Direct, English 3 In Stock All variants Out of stock LP - Boars Hat Direct, English 1 In Stock All variants Out of stock All variants Out of stock LP - Boars Hat Direct, English 1 In Stock All variants Out of stock All variants Out of stock NM - Boars Hat Direct, English 1 In StockLP - Boars Hat Direct, English 2 In Stock All variants Out of stock All variants Out of stock LP - Boars Hat Direct, English 3 In Stock All variants Out of stock NM - Boars Hat Direct, English 1 In StockLP - Boars Hat Direct, English 2 In Stock All variants Out of stock NM - Boars Hat Direct, English 4 In StockLightly Played, English 1 In StockLP - Boars Hat Direct, English 1 In Stock

That land then taps for one mana of the card's colors
Any card this cheap is worth at least considering for competitive play too, though I cant find too much evidence of Rebuff the Wicked making much of an impact in Modern so far