Show of Valor

The +2/+4 split is the giveaway: this is a defensive combat trick wearing a pump spell's clothing. Where the canonical white tricks of this rate lean toward a symmetric bump that helps swing a race, the lopsided toughness bonus tells you what the card is built to do: win a block, survive a burn spell, or turn a blocker into a wall the attacking team cannot punch through. The extra point of toughness over a +3/+3 buys a wider blocking range, which matters more in slow ground stalls than the one point of power it trades away. Functionally it rounds out a starter-level white aggro or defensive shell without claiming a spot in any deck built around combat tricks. Its job is teaching combat math (attack into open white mana and you may eat a creature you thought you could trade with) more than winning games on its own. A serviceable instant for a green-white or mono-white deck that wants a cheap surprise in combat, and nothing more ambitious than that.