Domain Zoo wants to curve out efficiently with Leyline Binding, Territorial Kavu, and Scion of Draco while leaning on Stubborn Denial for protection, so our Spell Pierce punishes them for tapping out on noncreature spells like Leyline Binding, Lightning Bolt, and Tribal Flames. Consign to Memory stops colorless threats like Scion of Draco and counters triggered abilities such as Leyline Binding's exile trigger, but it cannot counter any blue, red, or white spell, so save it for those targets. Mutagenic Growth loses value here since Leyline Binding exiles our creatures regardless of a +2/+2 pump, and Tribal Flames can deal up to 5 damage, so the pump rarely saves a creature. Extra Mishra's Baubles matter less than proactive protection in this fast, interactive mirror-adjacent matchup. Play around Leyline Binding by not overcommitting a single key threat into open white mana.