Karona

Karona's powers and abilities

Mana-festation - Karona is the physical embodiment of all of Dominaria's mana. With this, she wields an entire plane's worth of power and can conceivably perform any magical ability or spell that was usable with that mana pool. She was able to take punishment from three immensely powerful wizards, who each were considered god-like in their own right. Her control over Dominaria's magic was sufficient enough to risk the plane's structural integrity and later created the most powerful time rift on Dominaria, one which Nicol Bolas thought was impossible to close.

Faith - Karona carried with her an aura that caused those of sufficiently lower power to become enthralled by her. These beings's faith in Karona strengthened her further.

Resurrection - Karona seemingly has the ability to resurrect herself when certain criteria are met, such as the final battle between Akroma and Phage.

Semi-Planeswalking - Despite not being a planeswalker, Karona was able to move between planes without being disintegrated. This could possibly be due to her unique physiology or because part of her, Jeska/Phage, had an unignited Spark.

Creation/Reality Warping - Karona created multiple portals that allowed her to visit beings that were on her scale of power. However, the beings she purportedly visited either had no memory of her visits, were dead before she could have talked to them or not representative of their mana sources. Two theories are generally accepted on how this was accomplished: a) Karona created duplicates of these powerful beings based on memories or b) she traveled to alternate time lines where these beings existed in the way described. Both of these are possible within the Magic multiverse, but due to Karona's fractured mental state, it is hard to discern which is correct or if a combination is possible.

Karona's weaknesses

Mental State - Karona's fused consciousness and conflicting sponsor personalities have left her in an inherently fractured mental state. She is erratic and wrathful when she's been tricked, but is quick to trust and can fall for traps quite easily.