Horrific Assault
The fight-spell family has always paid for its efficiency with symmetry: your creature deals damage, and takes some back. This one strips the return trip entirely. Your creature swings its power into a creature or planeswalker and never flinches, which turns any oversized attacker you already control into a one-mana removal spell that also keeps the body around to do it again next turn. That is a meaningful shift in the risk math of green removal, which has historically leaned on cards where your best creature has to survive a trade to earn the kill. Here it does not have to survive anything; it just points and fires. The planeswalker clause matters too, since green's answers to walkers have usually meant connecting in combat rather than a clean sorcery-speed shot. The Eldrazi rider is the tell about who this was built for: a small life buffer stapled on for decks already fielding colorless titans, where a huge power number and an incidental three life reward the same board you were assembling anyway. Outside that shell it is a lean, honest one-mana bite that scales with whatever your largest creature happens to be, and inside it, it is a removal spell that also pads your cushion.
