Spellslinger decks use a high concentration of instants and sorceries alongside permanents that reward casting them. Cheap cantrips keep cards moving while removal, counterspells, and larger payoffs turn repeated spellcasting into a complete strategy.
Guttersnipe converts each instant or sorcery into two points of damage, while Storm-Kiln Artist produces Treasure. Veyran, Voice of Duality can double many triggered abilities caused by all those spells.