I did 15 krabkatoas for OAT GS and only one of them had a shadow (got ring and title). From that only got 1 black.. which ended up not having a shadow /sadface

Would be nice if SE could revise this and either make it easier to upgrade the abyssites (but then again doing emp wep trials could become more annoying constantly upgrading T2 to T3) or just remove the shadow requirement and adjust it so it always has a chance to drop, just a low rate (ideal since a chance is better than no chance if it has no shadow)