This is an enchantment-heavy grind, so a third and fourth Seal of Cleansing let you blow up Solitary Confinement or Sterling Grove on sight. Abeyance buys a turn where they can't cast instants or activate non-mana abilities in response to your enchantments, which matters since Mana Leak is weak against a deck that floods mana via Wild Growth and Serra's Sanctum. Mana Leak, an Intuition, and a Frantic Search come out since proactive answers matter more than extra card selection in this long matchup.