Sultai Control's manabase is loaded with nonbasics (Overgrown Tomb, Dreamroot Cascade, Watery Grave, Deathcap Glade, Starting Town), so Sunspine Lynx punishes them hard on entry and shuts off any incidental lifegain from cards like Ancient Cornucopia and Professor Dellian Fel. Shock is efficient, cheap burn to push extra damage or finish off damaged targets, though Glarb, Calamity's Augur has 4 toughness so Shock alone won't kill it before it filters their draws. Magebane Lizard doesn't pressure a deck this slow and reactive, and it can back you into bad spots if you're forced to cast your own noncreature spells, so it comes out. Full Bore is cut for more direct interaction since grinding through their removal-heavy suite (Shoot the Sheriff, Deadly Cover-Up) favors efficient threats and answers over pure pump.