Rare Steal always fail?

The rare steal simply has a 1/8 chance of being picked when a Steal is successful, as opposed to the common Steal, which has a 7/8 chance of being picked. Regarding the fact that the Lobo special doesn't fail, that's the point. If a perfectly viable Special still fails to Steal, then there must be a cause that isn't related to the Special attack itself. In this case, a level 39 thief in this circumstance looks to have about a 1/8 chance of having all possible RNG sequences fail against a level 77 target.

That's the thing I said it is likely rigged. The steal formula I mean, or some hidden formula we missed. Brachosaur LV77 has 46050 HP against my LV39 Gau. So that's 12% [39+50-77] without any Sneak Ring. Dealing around 250 damage backrow using Lobo rage with Offering, this would mean I need about 185 attacks to beat it. Since Thief Knife is 50-50 chance to steal, so let said 93 steal attempt to steal rare Ribbon. With this much chance I should had stolen Ribbon, but some battle I just didn't, and that make no sense. If it rarely happen, fine. But this is common enough (feel like 50-50 chance) that I will always fail to steal no matter what.

I could misunderstood all this time. If that steal formula is correct, then maybe there is a follow up in rare steal in that 12% divided by 1/8 for 1.5% per steal attempt. However, in some battle the first 10 attempt will get the rare steal if it wasn't part of my feeling in 50-50 of the time. Something is wrong. I don't know what, but my experience said so.