I wanted to clarify some of the Shoggoths moves.
1. When a Shoggoth needs to summoned thru Evil Stirs and the location is also a Portal, does it mean an Old One needs to be revealed or will this happen on the next summoning card having the shoggoth symbol?
2. When a Shoggoth moves to the Portal, does it awaken a Old One or will it happen after the next Summoning card with tha Shoggoth symbol?
Next card to both. It's when a Shoggoth is activated while already on an open portal that Bad Things happen.
Thematically, it's the act of moving through the portal that causes the awakening, so moving to/spawning in a location with a portal just put the Shoggoth within distance of it, and it won't be until it tries to move again that it can pass through.