Might of the Massesutility$0.09A green combat trick that boosts a creature and can help push damage through. It can also replace itself with a card draw spell if you need a similar cheap cantrip effect.
Giant Growthutility$0.19Classic 1-mana green combat trick that increases a creature's combat impact. It is the closest budget analogue in rate, though it does not grant trample or draw a card.
Snakeskin Veilprotection$0.08One-mana green trick that protects a creature and improves combat. It is a common low-cost instant-speed play in the same space as Charge Through, though its effect is defensive rather than granting trample.
Tyvar's Standprotection$0.59A flexible one-mana instant that can serve as protection and a combat trick. It is a strict upgrade in many situations because it scales better, though it does not draw a card or grant trample specifically.
Rancorutility$0.94Not an instant, but it fulfills the same broad role of enabling a creature to push damage through, especially with trample. It is a long-term upgrade in efficiency if you want repeated evasion instead of a one-shot trick.
Aspect of Hydrautility$0.25A cheap green combat trick that can dramatically increase damage output in mono-green decks. It fills the same aggressive role of helping a creature connect, though it lacks trample and card draw.
Adventurous Impulsecard_draw$0.17A green one-mana cantrip that helps smooth draws and keep your spell count high. It is similar only in the card-replacement aspect, not the combat effect.
Traverse the Ulvenwaldcard_draw$0.70Another green one-mana spell that replaces itself with card selection and can scale into a stronger late-game effect. It is a functional alternative if you mainly want a cheap cantrip in green.