Heroic Intervention is the bane of every player trying to wrath away a monstrous board of Beasts, Hydras or Dinosaurs
You don't pay mana for the attachment, and the timing restrictions for equip abilities don't apply
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
What if they were looked at with different eyes
Well, thanks to the extremely overpowered Companion mechanic, you can do that via Jegantha, the Wellspring
Mage-Ring Bully, which we looked at earlier, gets a power buff when you play Dragon Fodder, meaning that in some circumstances you can cheat creatures into play and still get Mage-Ring Bullys prowess trigger to activate