Plated Geopede
The body asks the question; the first strike answers it. A 1/1 swinging into a board is a non-threat, but landfall turns the attack step into a problem your opponent has to solve under incomplete information: drop a land and this becomes a 3/3 that wins most exchanges it walks into. The wrinkle is that the pump triggers on any land entering, not just on your main phase, so an uncracked fetchland sitting in play can be sprung in response to a block, swelling the body to a size that punishes a defender who committed to the math of a 1/1. First strike is the keyword doing the heavy lifting: a vanilla landfall pumper trades evenly, but the first-strike clause means the +2/+2 deals its damage before the blocker's, so a freshly pumped 3/3 cleanly kills a blocker of three toughness or less and walks away untouched. It belongs to the early landfall design wave, when red was being taught to reward greedy, fetch-heavy manabases by converting the act of cracking lands into combat tempo. The reward scales with how aggressively you sequence: chain fetches to swing for absurd numbers, or simply curve out and let the first strike police the ground. The 1/1 base is the price, and it is a real one outside a deck built to keep the lands flowing.


