Duskhunter Bat

Bloodthirst is the keyword that grades your turn order: connect for a point first, and the creature that follows enters a size bigger than its cost suggests. On a 1/1 flier for two, that conditional bonus matters more than it does on the ground, because the 2/2 evasive body it becomes is exactly the threat that closes a tempo race. The catch is that the upgrade is front-loaded and fragile: it applies only on entry, only if an opponent has already taken damage, so a topdeck onto an empty board is just a 1/1 with wings. That sequencing demand is the entire reward structure of the keyword, which is why aggressive black decks built around early evasion are where the design lives or dies. Cast on curve behind a one-drop that got through, it is a clean two-power flier for two mana; cast late, it is the worst version of itself. The body is doing nothing exotic, but the keyword sets clear terms: tempo discipline, a board that is already ahead, and a willingness to commit damage before you commit the creature.