Grixis Affinity is a fast, go-wide artifact aggro deck that wins via overwhelming board presence and Galvanic Blast reach, so this matchup is primarily a race where Ruby Storm must assemble its combo turn before taking lethal damage. Firebending Lesson is a one-mana instant that deals 2 damage to a creature, enough to kill Refurbished Familiar or Krark-Clan Shaman without costing much tempo, and its kicker deals 5 to handle a Myr Enforcer or Utrom Monitor in a longer game. It also counts as an extra spell for storm. Electric Revelation is trimmed slightly since its discard cost is a real tempo cost against such a fast clock. Seize the Storm, Desperate Ritual, Seething Song, and Manamorphose all remain central, since outracing their board with a single huge trampling token is still the most reliable path to victory.