Dross Hopper

Evasion you pay for in bodies. The activation has no mana cost and no tap symbol: it asks for a creature instead, and each sacrifice buys exactly one turn of flight. That repeatability is the whole tension. With a wide enough board you could give it flying every turn forever, but the math never works in your favor for combat alone (you trade two creatures to push two damage), so the ability isn't really about getting this past blockers. It's a release valve for a sacrifice deck: a free outlet that turns expendable creatures into a death trigger's worth of value when you have a reason to feed it, and incidentally a way to dodge a removal spell or chump a flyer by spending something you wanted to sacrifice regardless. The flying clause is almost a courtesy on top of the outlet. As a 2/1 the card wants to attack early and the activation lets it slip through once the ground stalls, but its real home is any shell that profits from creatures dying rather than from this one connecting. Read it as a no-cost sacrifice engine wearing a 2/1 aggressive body, and the design clicks: the evasion is the bait, the free outlet is the payload.