Leery Fogbeast

Four power for three mana on a 4/2 body, sold with a prevention clause that reads like protection and behaves like a leash. The trigger keys off becoming blocked, and the result is a board-wide fog: all combat damage that turn is prevented, both sides included. The honest math runs the opposite direction from what the rate suggests. A defender who blocks loses nothing: their creature survives, the four never connects, and four damage is stopped for free. So this is not a creature opponents are pressured to let through; it is one they are happy to wall, because the wall costs them nothing. The drawback compounds the moment you attack alongside it. Swing wide into an open board and the defender can throw a single chump in front of the fogbeast on purpose, firing the trigger and zeroing out every other attacker that turn. The prevention is a switch the blocking player gets to flip, and they flip it whenever it serves them. The asymmetry is the whole story: the clause keys off being blocked, which only happens on offense, so on defense the drawback simply never fires. Left back, this is a clean 4/2 that trades up, ambushes a careless attacker, and deals its full four. The card you want to attack with is the card you would rather leave home; the body is at its best doing the one job the rate never advertised.