Gaddock Teeg is strong against Sultai Aluren, locking out Aluren (mana value 4) and Omniscience (mana value 10), the noncreature cards their combo plans lean on, along with any noncreature X-cost spells they might bring in. Show and Tell and Stock Up are both mana value 3 with no X, so Teeg does not stop them. Teeg also blocks ground creatures while we assemble Dark Depths, though it shuts off our own Green Sun's Zenith while it's in play. We make a light swap. Their maindeck Veil of Summer only gives hexproof from blue and from black, so it does not stop our white Swords to Plowshares, and it mainly keeps their spells from being countered. Our existing removal stays reliable, so we avoid overcommitting narrow sideboard pieces; Swords to Plowshares remains our primary tool against Atraxa, Grand Unifier and Acererak the Archlich.