Best Mono-Blue budget alternatives to Disrupting Shoal

Disrupting Shoal
$21.73 MarketCard Breakdown: Disrupting Shoal (Instant — Arcane) is a high-demand MTG card. At $21.73, budget-conscious players can leverage vector embedding similarity to achieve similar game actions for under $5.00.
Top Vector-Ranked Budget Swaps
Spell Burst
(Instant)
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.) Counter target spell with mana value X.
Matches Disrupting Shoal's Instant card type and costs 1 less mana to cast (1 MV vs 2 MV). Fills a similar strategic role in Commander and deck construction.
Foil
(Instant)
You may discard an Island card and another card rather than pay this spell's mana cost. Counter target spell.
Matches Disrupting Shoal's Instant card type and costs 2 more mana to cast (4 MV). Overlaps on functional mechanics including #counterspell-free, #manaless-value.
Dispersal Shield
(Instant)
Counter target spell if its mana value is less than or equal to the greatest mana value among permanents you control.
Matches Disrupting Shoal's Instant card type and shares the exact same mana value (2 MV). Overlaps on functional mechanics including #mana-value-matters.
Daze
(Instant)
You may return an Island you control to its owner's hand rather than pay this spell's mana cost. Counter target spell unless its controller pays {1}.
Matches Disrupting Shoal's Instant card type and shares the exact same mana value (2 MV). Overlaps on functional mechanics including #counterspell-free, #manaless-value.
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