You can swat Great Intelligence's Plan (and choose another target opponent), and you can Swat This Is How It Ends (and target another creature)
If one of the tokens somehow is under another player's control as the delayed triggered ability resolves, you can't sacrifice that token
This omission recalls some weird semantic debates over who the true Cid of the 15th game is, as there is indeed a character named Cid in it and he has a card in this set, but his granddaughter Cindy is the mechanic the team interfaces with most of the time
In Pokemon, this is exemplified in Stadium Cards, a special type of Trainer Card with passive or activated effects for both players
In Duskmourn alone, that means they synergize with delirium and eerie cards
You can keep your Gem Mint 9.5s, and they will be considered Gem Mint 10s in Verify CGC Cards Certification, the CGC Cards Population Report and the CGC Cards Registry