Vigorous Charge

Trample for a single green mana is the floor here, and it was a well-understood rate long before this design: a way to push a fattie's damage past a chump-blocker for a price low enough to be an afterthought. The interesting half is the kicker, the additional-cost mechanic that defined the era this card belongs to. Pay the white and the spell stops being a combat trick and becomes a swing in the life race: every point of combat damage that creature deals comes back to you, blockers included, so a connecting trampler can erase a chunk of an aggressive opponent's clock in one attack step. The design lesson is that the two halves point at different decks. Unkicked, it lives in mono-green stompy as cheap evasion. Kicked, it wants a green-white shell with a body big enough that the lifegain matters, the splash payoff that justifies finding the white in the first place. The friction is that the kicker only triggers off combat damage from that one creature this turn: no attack, no life, and a removed creature wastes the white entirely. It is a modest card by rate, but it is a clean demonstration of kicker doing its intended work, scaling a one-mana green spell into a two-color play without splitting the effect across two separate cards.