Most Powerful Feats Accomplished During Meditation

What are the most powerful feats accomplished in the mythos by Force users during meditation?

Kyp's Dovin Basal

Sidious and Plagueis unbalancing the Force
Luke's meditative shenanigans in LotF: Invincible
Yoda creating those elaborate illusions in Rebels

Vader healing his scarred tissues and being able to breath outside his suit momentarily 😄

Originally posted by The Ellimist

Luke's meditative shenanigans in LotF: Invincible

Originally posted by Unbowed
What are those?

Eh, he was predicting at will with really precise detail the outcomes of events and hypotheticals, and jamming Caedus's own visions by inserting himself in there and making Jacen think Luke was going to kill and replace him.

I think Sidious and Yoda have done similar things.

He also amped Jaina and then put his face on her to make Caedus think he was there.