the squirrel's spirit

: the squirrel is indestructible, hexproof, and has protection from everything as long as there is one green or black creature on the battlefield
+3: amasquirrel 5 (put 5 +1\+1 counters on a squirreleternal token. if you don't have one, create a 0\0 green and black squirreleternal token first)
+2: create a 2\2 black squirrel spirit token creature.