Mythic Trickster ability called Transfer Magic questions

[Eigengrau]

The ability Transfer Magic say that you can transfer a magical effect from someone to yourself but it can't be from magical items like Bracers of Armor.

Besides spells, what else could this be used to transfer? Would you be able to steal a Barbarian Rage or Druid wildshape? or are there any other class buff effects that could be transferred? Maybe a Hunters Animal Focus?

[Eigengrau]

Bump

[RainOfSteel]

I am going to vaguely guess it refers to buff spells.

I personally would not allow the stealing of SU abilities. The mythic rules are already broken enough.