Ratatoskr, the Messenger

At the beginning of your end step, each player
creates a 1/1 green Squirrel creature token for
each forest they control.
Tap all untapped Squirrels you control: Put a
basic forest from your hand into play tapped,
then search your library for X basic forest cards,
where X is equal to the number of Squirrels you
tapped. Then you may put a basic forest card
from your hand into play tapped.