Defiant Strike

The +1/+0 is almost beside the point: this is a one-mana white cantrip that happens to also nudge a creature, and the design logic runs in that direction rather than the reverse. White rarely gets to replace its cards cleanly, so the buff is the tax that justifies the draw, a reason to point the spell at a creature rather than just refilling the hand. The effect lives at instant speed, which is where its real value sits: held up through a combat step, it turns a trade into a win or pushes a marginal point of damage through while cycling itself for the next threat. Compared with the older line of pump-and-cantrip designs, the math here is honest about what it is for; the modest power boost reads as the friction on a card-neutral combat trick, not as a spell you cast for the buff alone. It belongs to the lineage of effects that keep an aggressive white deck from running out of gas, where any spell that does something useful in combat and replaces itself is doing two jobs at the cost of one card.