Chatterfang, Squirrel General [Modern Horizons 2 Prerelease Promos]

Forestwalk (This creature can’t be blocked as long aw defending player controls a forest.)
If one or more token would be created under your control, those tokens plus that many 1/1 green squirrel creature tokens are created instead.
{B}, Sacrifice X Squirrels: Target creature gets +X/-X until end of turn.