Belcher is a fast combo deck aiming to assemble Goblin Charbelcher or big mana off Lotus Bloom for a one-shot kill, so creature-based interaction like Sheoldred's Edict is dead weight since they run almost no creatures. Consign to Memory is excellent, cheaply countering colorless spells like Goblin Charbelcher or Lotus Bloom, while Mystical Dispute discounts against their Disrupting Shoal, Jwari Disruption, and Counterspell. Your Counterspell and Force of Negation suite are premium here to stop Goblin Charbelcher or a key ramp piece before it resolves; prioritize countering their payoff spells over their enablers when forced to choose, and keep Field of Ruin passive since their manabase isn't the primary threat.