Sunspine Lynx is the premier card against Lifegain: it shuts off their entire gameplan (Case of the Uneaten Feast, Enlightened Confidant, Haliya, Guided by Light, Ajani Resolute's loyalty gain, Starscape Cleric, Moseo's Infusion recursion) by making players unable to gain life, and its enters-the-battlefield damage punishes their nonbasic-heavy manabase (Godless Shrine, Concealed Courtyard, Shattered Sanctum, Multiversal Passage, Bleachbone Verge). Scorching Shot's 5 damage reliably kills Amalia Benavides Aguirre before she grows out of range. Channeled Dragonfire's 2 damage is too weak against their 2+ toughness creatures, so trim it for the Lynx package. Keep burn spells pointed at their small lifegain triggers like Hinterland Sanctifier to deny value before it compounds.