Amulet Titan wants to resolve Primeval Titan, Scapeshift, or a big Cultivator Colossus, so Mystical Dispute is excellent here since it's a cheap, discounted counter against their blue spells like Summoner's Pact's trigger payment isn't targetable but their ramp spells and Scapeshift are fair game as noncreature spells if they splash blue, and even at full price it answers key cards. Sheoldred's Edict is weak since they often have zero or multiple nontoken creatures and can choose what to sacrifice cheaply; Spell Snare whiffs on most of their relevant spells which cost more than two. Toxic Deluge is a clean sweeper versus their small ramp creatures and tokens, while Engineered Explosives can blow up a wave of Eldrazi Spawn-style mana dorks or cheap artifacts. Keep Force of Negation and Drown in the Loch as premium answers to their Scapeshift and big creatures.