Like most Magic: The Gathering cards, the value of Ragefire depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Ravnica Allegiance)
Sorcery Color tag templates(None) Casualties of War Choose one or more Destroy target artifact
Creatures (12) Dragon's Rage Channeler x4 Monastery Swiftspear x4 Slickshot Show-Off x4 Instants (14) Lava Dart x4 Lightning Bolt x4 Mutagenic Growth x4 Unholy Heat x2 Sorceries (8) Preordain x4 Expressive Iteration x4 Artifacts (8) Mishra's Bauble x4 Cori-Steel Cutter x4 Lands (18) Arid Mesa x3 Bloodstained Mire x2 Fiery Islet Mountain x3 Scalding Tarn x2 Steam Vents x3 Thundering Falls Wooded Foothills x3 Sideboard (15) Consign to Memory x4 Into the Flood Maw x2 Meltdown x2 Soul-Guide Lantern x2 Spell Pierce x2 Unholy Heat Blood Moon x2 This is Izzet Prowess in Modern and the land count is 18, with zero cards that costs more than 3 mana to cast
This can be a mixed bag, of course, but can also be quite the surprise for opponents when it comes to alpha strikes and the like
If it changes zones, it will either cease to exist (if it's a token) or cease to be a copy (if it's a nontoken permanent), and so you won't be able to cast it as an Adventure