Clamor Shaman

Most evasion-on-a-body cards keep the trick to themselves: "this creature can't be blocked." This one hands the effect outward. The attack trigger removes a single defender, so the value scales with the board you've assembled rather than the size of this 1/1: pick the opponent's one relevant blocker, strip it out of the picture, and the ground army you built up all game connects behind it. That is why the small frame barely registers. The evasion is the payload, and the body is just the delivery mechanism that has to survive long enough to swing. Riot is what lets the plan happen on the turn it needs to. The +1/+1 counter grows a fragile Goblin into something a blocker actually has to answer, but haste is usually the mode that matters: cast it pre-combat, declare it as an attacker, aim the trigger at their best defender, and the rest of your creatures get through the same turn instead of waiting a rotation for summoning sickness to wear off. A red aggressive shell wants exactly this kind of stall-breaker, a threat that turns a clogged ground race into a lethal push without spending extra mana on a combat trick or holding up removal. The choice-of-mode entrance and the throwaway body are the price; opening a lane for the whole team, immediately, is what you're buying.