Thanks to everyone for feedback on Twilight Words ... Well, I decided to rethink the idea by changing some things, because I really liked her idea ... So I increased the rarity for Epic and the cost by +1. Changing the draw a card to summon to 1/1 copy of it now opens up a wide range of options and combos. I think the result just got better, but it can still get better.
(I also changed the name of the tokens for a bigger flavor hehehehhe ...)
I think the card is too complex now. Also, it has 5 lines of text, which is usually disclaimed.
I'd go back to the previous effect and do one of the following:
Buff the Power Word option. Something like "Give a minion +5 Health and Taunt" would make the card much better against swarm decks, for instance.
Nerf the Shadow Word option (and decrease the Mana cost). Instead of destroying minions with 5+ Attack, it could only affect those with 6+ or 7+, inline with BGH.
I find it very funny that Mrgl is one of the sacred Power Words, but the current effect looks more like a Blessing. Not really sure how to fix it, since removing the Attack part would make the card really weak.
I'm pretty sure no one else besides me will have a problem, so you're probably fine going with it.
I think Warrior is acceptable (I'm not sure, since the cross-class part of the challenge is something the mods added later, not something I proposed). I don't think the card feels like a Power Word, though.