Preload

Description
Fire a 20 damage shot that pierces. Next is reduced by one second.

Strategy and Synergy
Lowering shuffle time is theoretically good in any deck, but Preload is somewhat underwhelming. Its 20-damage projectile is nearly insignificant, and the only reason to use it is to reduce shuffle time. In that sense, it's just, but as a Legendary spell that costs 2 Mana. Only recommended if you already have good and/or high max, or if you already have  and want to double up on its effects.

can also be used with Preload to almost eliminate your shuffle time entirely, at the cost of 3 Mana.

Preload can be good in decks - lowering shuffle time is extremely desirable, and its low cost means it won't interfere too much with spellcasting.