Budget Alternatives to Breaching Leviathan

Will of the Naga $0.04 4UU · Instant Delve Frostveil Ambush $0.05 3UU · Instant Tap up to two target creatures. Permafrost Trap $0.07 2UU · Trap If an opponent had a green creature enter the battlefield under their control this turn, you may ... Sudden Storm $0.08 3U · Instant Tap up to two target creatures. Send to Sleep $0.08 1U · Instant Tap up to two target creatures. Chilling Grasp $0.09 2U · Instant Tap up to two target creatures. Frost Breath $0.09 2U · Instant Tap up to two target creatures. Clinging Mists $0.11 2G · Instant Prevent all combat damage that would be dealt this turn. Wrath of Marit Lage $0.20 3UU · Enchantment When this enchantment enters, tap all red creatures. Cone of Cold $0.21 3U · Sorcery Roll a d20. Archipelagore $0.24 5UU · Leviathan Mutate {5}{U} Shipbreaker Kraken $0.27 4UU · Kraken {6}{U}{U}: Monstrosity 4. Lorthos, the Tidemaker $0.28 5UUU · Octopus Whenever Lorthos attacks, you may pay {8}. Dragon Turtle $0.35 1UU · Dragon Turtle Flash Dream Tides $0.35 2UU · Enchantment Creatures don't untap during their controllers' untap steps. The Savant $0.51 Hero Exile The Savant: Tap all creatures your opponents control. Icy Blast $0.76 XU · Instant Tap X target creatures.