Mayril, Rune Enchanter

Whenever Mayril, Rune Enchanter or another enchantment enters the battlefield under your
control, create a copy of target enchantment
under you control. If it is an aura you may choose
new targets. This only triggers once per turn.
If an enchantment token would leave the battlefield create a 1/1 squirrel token.
Cycle life into energy, and energy back into life.