Blighted Bat

The optional haste activation is the tell that this was built as a curve-filler with a use for leftover mana. A 2/1 flier for three is plain by any measure, so the design bolts a cheap sink onto the body: pay the one mana and it can attack the turn it lands, or the turn it comes down late off the top. That is the whole function. Haste on a creature matters only the turn it arrives, so the ability is a one-shot piece of relevance rather than a recurring tax; it converts an off-curve or top-decked drop into an evasive 2/1 that gets in for damage immediately instead of stalling a turn. Nothing about the design invites a build-around. There is no enter-the-battlefield trigger to loop, no death payoff to chain, just a two-power flier that trades down in combat and gives a tempo-minded black deck somewhere to spend a stray mana when it has nothing better to do. The activation is priced to be nearly free precisely because it is a comfort feature, not an engine: the sort of small optimization that smooths a low-to-the-ground aggressive curve without ever pretending the underlying body is more than filler.