Create two 1/1 green Squirrel creature tokens. Then each creature that isn't an Insect, Rat, Spider, or Squirrel gets -1/-1 until end of turn for each creature you control that's an Insect, Rat, Spider, or Squirrel.
"Life and death are a cycle, and it is I who keeps it spinning."
—Decai, squirrelfolk rotmaster