Other Squirrels you control get +1/+1.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.) If one or more tokens 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.

Create a 1/1 green Squirrel creature token. Storm (When you cast this spell, copy it for each spell cast before it this turn.)

At the beginning of your upkeep, you may sacrifice a token. If you do, put an acorn counter on this artifact. Squirrels you control get +1/+1 for each acorn counter on this artifact. {G}, {T}: Create a 1/1 green Squirrel creature token.

Vanishing 3 (This creature enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) When this creature enters, create four 1/1 green Squirrel creature tokens. Squirrels you control get +1/+1.

When this creature enters, create two 1/1 green Squirrel creature tokens. {3}{B}: Squirrels you control get +1/+0 and gain menace until end of turn.

Evolve (Whenever a creature you control enters, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) Whenever one or more +1/+1 counters are put on this creature, you may create a 1/1 green Squirrel creature token.

When this enchantment enters, create a 1/1 green Squirrel creature token. Whenever a nontoken creature you control dies, you may pay {1}. If you do, return this enchantment to its owner's hand.

({T}: Add {G}.)