Kathelia...zelia, stars above she's [i]thinking[/i] like she talks now?! Ka...ze...lia. Okay Kathelia, think. Ugh, forget it, just think. You're bound up in [i]ouch[/i] very uncomfortable thorns. They didn't bother with a gag and they're mimicking your voice. You could use magic, throw your voice, pretend to be them and confuse them, maybe tell them to untie you. That could work, right? Ugh, no, that's dumb, she's tried to shout and mess with her voice like three times, but she's acting like she's normal and can do tricks that way to distract when clearly her voice is all messed up and only getting worse. 

Hmm, maybe, she could try to activate her spear still. Her ultra cool awesome spear might be able to burn some of the thorns off. She'd rejected that one earlier though because she'd just get stuck fighting spriggans if she started doing that and it would take a long time. What she wanted was to slip away quietly, or to take them down decisively. If she only had help. 

Well, there was Mother. She knew in her heart that could still help, but if she let Mother's power out now, she'd be exhausted, probably just curl up right here in the ruins to take a nap, especially in her weakened body. That was an ultra, ultra last resort. Like, things had to get way worse than being buried to pull that one out. 

Okay, okay, what if, what if they just buried her poorly. If she could loosen the thorns. Spriggan thorns only had hardness 3, so that wouldn't be too hard, she could just use a little magic (she'd be careful not to make it sparkle like normal) and then, yeah, with the thorns looser she could cave out some extra dirt as they did the burying so she'd have room to move and a little air pocket. Everyone knew that air pressure was really strong, so if she did it right and the air had nowhere to go, it would hold while they finished burying her and [i]that[/i] would mean she could wait a few minutes without needing to hold her breath and then just push her way out and walk off with no trouble. Okay, yeah that could work. Good thinking, Kathelia!

So, the key here was just being a bit subtle about loosening things. A bit of chilly magic, no sparkles, loosen the thorns bit by bit so they didn't cut or pinch and then just pull them off and do her big breakout when the moment was right.

[Overcome the thorns with subtle magic: 5+6+1=12]