A quick horizontal stab. Similar range to 5B and air unblockable, but it's slightly slower and has worse recovery on whiff. Hitbox is higher, making it a better anti-air, but it can whiff on crouchers. Causes a knockdown on air opponents. All of Senna's ground normals can cancel into this, and it can cancel into 5B, 5C, or 2C, allowing for pseudo-rebeats. High base damage makes it useful near the start of combos, although it doesn't combo directly from 5A/2A so its pushback can make it hard to use.