once both are on the field with a single Squirrel, you can sacrifice the Squirrel to Chatterfang, create a Treasure from the Plunderer, and Chatterfang will see that Treasure and create a new Squirrel
One-mana bounce usually gets only creatures, like Unsummon
But there might be some - and the size and weight of a card could be a crucial difference that helps you spot a fake
Goad effects like Taunt from the Rampart and Disrupt Decorum are the bluntest tools here, but you can also use Gix, Yawgmoth Praetor, Scriv, the Obligator, and Edric, Spymaster of Trest to reward your opponents getting into the red zone
The rewards vary, but usually, they unlock exclusive cards and cosmetics
Cards like Michelangelo, Improviser use sneak to enter combat tapped and attacking, while spells such as Shredders Technique and The Last Ronins Technique can be deployed mid-combat for discounted costs, turning what looks like a safe block into a blowout