Reckless Charge

What separates this from a generic pump spell is that it bills you twice and is worth paying both times. The first cast for a single red hands a creature haste and a sizable swing, turning a freshly resolved threat into immediate damage; flashback lets the graveyard run the same effect again on a different attacker a turn or two later. That doubling explains why it became a fixture of early red beatdown built around recursion and graveyard fuel: a reanimated body or a creature just cast this turn wants exactly this, and the spell's willingness to be spent again meant it never sat dead in the yard. The haste clause does more work than the power bonus, because it converts mana sunk into a creature this turn into a clock that bypasses summoning sickness; the +3/+0 mostly determines how much that clock hits for. Stack it onto a body with trample or evasion and the bonus stops being a marginal trick and becomes a reach calculation. The name fits the math: the charge is reckless because the attacker often dies in the exchange, but the spell has already paid out, and the flashback half is waiting to pay out once more. Few one-mana enablers from its era have aged this gracefully into formats that reward cheap, recurring aggression.