And that makes it very hard to test. I think it is very cool that you can slow your opponent in basicly every combo in S3 as long as you have meter with shadow spike. Would be even better if it was a real ender…
I am gonna focus on moves that are + on block. Jago shouldn’t try to frame trap you with his Sword move while slowed. Even the hard version, that is +2 on block, can be punished with st.LK (1 frame punish).
Slow is VERY good, too bad shadow moves can’t be slowed 
I also tested, whether invincible frames on dragon punshes also “slow” down. Would be cool if they stayed the same, so you could meaty a DP move and trait or even beat it. But unfortunately I didn’t get it to work. Kinda hard to test with no inforamtion on invincibilty frames available.
Are throws also slowed???