Cursed Scrollutility$3.28A cheap repeatable damage source that can function as removal or reach in red decks. While not a one-shot sacrifice effect, it fills a similar low-cost utility role.
Shard Volleyremoval$0.22One-mana red damage spell that can hit any target for 3, making it a close direct-damage alternative. It asks for sacrificing a land instead of the delayed enchantment sacrifice.
Lightning Boltremoval$2.13The premier 1-mana red damage spell to any target, serving the same efficient burn/removal role. It deals more damage immediately with no setup.
Lava Spikeburn$0.98A very efficient one-mana burn spell, though it only targets players. It is similar as cheap red damage, but less flexible than Seal of Fire.
Rift BoltremovalBudget$0.18Three damage for a low cost, often used as cheap red reach and removal. It is slower due to suspend but hits harder than Seal of Fire.
Skredremoval$1.47Cheap red removal that scales in damage, often serving the same early-game interaction slot. In mono-red or snow-heavy decks it is much stronger than Seal of Fire.
Searing SpearremovalBudget$0.08Instant-speed 2-damage burn that can hit creatures or players, very close in functionality. It costs more but is a cleaner, immediate spell.
Abraderemoval$0.32Flexible red removal that can either kill small creatures or destroy artifacts. It is more expensive, but occupies a similar cheap interaction slot.