Masteria Expansions, Names and the proof for each

Yes, Subani appeared to the Mayor in a dream. Wasn't physical contact.

For the attacks on the Maple World, the only notable ones were the Dr. Krakia one and the one where Margana says that she "located his grave under bigger ben." The rest were all just attack commands and how they were invading leafre, or have already invaded KFT and are moving to Ludi...etc.

The people who said the commands were:
Some mysterious thing
The 4 Grandmasters (Don't remember names off of top of my head)
The 2 Mini-Grandmasters that the warrior grandmaster spawns (Don't remember names off of top of my head)
Dr. Krakia