Sleight

Strategy and Synergy
This spell goes hand-in-hand with the Gunner, since his artifact can be pulled over without the need of a  and his starting weapons are pretty decent, making for a good catalyst spell.

Any other on-shuffle artifacts such as, , , , and  synergizes greatly with Sleight, allowing the player to trigger their abilities up to twice (or more, if using Bolt-Action) per shuffle (When casting Sleight and later on when actually re-shuffling the deck).

,, and  turns Sleight into a good catalyst for Trinity and Flow oriented decks, while the latter two makes Sleight a somewhat viable spell for offense, albeit difficult to use effectively for this purpose.