With the exception of Glorious End, ending your opponents turn costs six mana at the least
In the future you may want to replace it as edict (originally from the card Diabolic Edict) effects often dont get what you want to kill
Legality depends on the tournament format -- Mirkwood Bats can be legal in some formats and banned or restricted in others
I think this deck could seriously benefit from a few new inclusions that could take its power level to, well, the next level
Frankly, I would just like to see a few more of these creatures show up from time to time, still retaining some level of specialness while also being adapted to the current world of Magic by stapling keywords like Prowess and Menace to a body, possibly as a subset of the shapeshifter tribe that arent just Clone
Its an effective game plan that benefits from damage amplifiers like Torbran, Thane of Red Fell and never needs to engage in combat