Odyssey , Weatherlight , Torment , and other sets also have cards that produce Squirrel tokens
Discard Spells: Court of Ambition, Bottomless Pit, Chain of Smog, Dark Deal, Divest, Hymn to Tourach, Mind Rake, Mind Shatter (you can change to Mind Twist), Thoughtseize, and Davriel, Rogue Shadowmage
What's an opponent supposed to do
It's exactly as it sounds
Sram, Senior Edificer This Zero-Cost Artifact Engine Goes Brrrrrr Running out of cards in your hand is one of the worst things that can happen in a game of Commander, resulting in slow-trudging games of top-decking
Four of the included cards are reprints from The First Chapter, which fully released at the beginning of Septemeber: Genie, Powers Unleashed