Plant Brain, Evil Forest Core

Whenever Plant Brain deals damage to a creature,
flip a coin; if you win, attach a Darkness status
effect to it.
{b}{g}{w}, {t}: Create a 2/3 Prison Cage creature
token with "Exile target creature with power 3 or
less until Prison Cage leaves the battlefield."
When Plant Brain leaves the battlefield, sacrifice
all Prison Cage creatures you control and create 3
1/1 black and green Plant Spider creature tokens.