Template:Harley s2

Harley Quinn's special 2, or the team damage boost effect in particular, has a slightly different effect: right after using the damage boost, she goes into the immune to flinching state first (damage can be done, specials can deal damage and be initiated, she cannot block but cannot be knocked out) for a short time before briefly turning full invulnerable and then back to normal. This means that uniquely it is possible, when immediately used after, for faster specials (e.g. Wonder Woman's Shield Toss) to deal full damage in the first stage without her being able to block, slower specials (e.g. Shazam's Bolt of Zeus) will hit her in her full invulnerable phase and do no damage and very slow specials (e.g. Batman's Explosive Batarang) can be initiated during this period but only hit when she has completely returned to normal. Multi-hit attacks can hit her in different stages; Darkseid's Omega Blast will have its first hit in the first stage (full unblockable damage), while the second and third hits will be in the second stage (no damage dealt). This delayed invulnerability is excellent when you can predict dangerous enemy specials and negate some of their damage.

Harley Quinn's special 2 in general also has a significant mechanic difference compared to other specials: it runs in real time, while most other specials (including Zatanna's special 2 despite similar option-choosing) take place in bullet time. There are a few noticeable effects: in-universe timers, such as Ares' block disable, will continue to tick down during her s2; damage over time effects, while normally will continue to hit during a special, since specials take a short in-universe time (a much longer time in the real world while you tap/swipe) the damage is not as much, but Harley's s2 runs in a long time in-universe so damage over time can have a much more significant effect.