In Seven Deadly Sins (Nanatsu no Taizai in Japan) season 2 episode 5, Merlin is turned into a stone statue by Galand.
As the powerful Galand is easily defeating the heroes one by one, Merlin tries to buy time by telling a lie to try and trick him. Unfortunately for Merlin, due to his special power, anyone who tells a lie before Galand will turn into a stone statue.
During the scene, Merlin thinks she has the upper hand until the spell starts. Her bold face lie turns into worry and confusion as she tries to figure out what is happening. The spell turns her body to stone from bottom to top, and there are a few great angles. Merlin becomes a statue just as she realizes the consequences of what she's just done, and her expression shows it.
Her allies look on in horror, and are shocked that the great sorceress Merlin was turned into a stone statue so easily. Galand laughs, taunts her, and attempts to shatter her to pieces. Her statue is rescued before this can happen, but she remains a statue for the rest of the episode.
I love everything about this scene!

Clips:
(Japanese no subs)
0:45 -
https://www.youtube.com/watch?v=CNzcbiul8jE(English subs)
9:48 -
https://vimeo.com/255158086