The trick is that you can only attack (challenge) characters that are currently gaining victory points (questing) or using abilities (i.e., they are exerted), thereby preventing them from gaining more points
Solitude also benefits from two companions which can be pitched to evoke Solitude

Commander 2014 Filter: In Stock Out of Stock Show All LP - Boars Hat Direct, English 1 In Stock All variants Out of stock NM - Boars Hat Direct, English 1 In Stock NM - Boars Hat Direct, English 2 In StockLP - Boars Hat Direct, English 3 In Stock Near Mint, English 1 In StockLightly Played, English 1 In 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 All variants Out of stock All variants Out of stock LP - Boars Hat Direct, English 1 In Stock All variants Out of stock NM - Boars Hat Direct, English 1 In Stock Lightly Played, English 1 In StockLP - Boars Hat Direct, English 1 In Stock LP - Boars Hat Direct, English 2 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 All variants Out of stock LP - Boars Hat Direct, English 2 In Stock NM - Boars Hat Direct, English 2 In StockLP - Boars Hat Direct, English 1 In Stock LP - Boars Hat Direct, English 1 In Stock All variants Out of stock

Any time one of your creatures dies, you get it right back unless an opponent is willing to pay three life