All Plant-Type monsters you currently control gain 300 ATK for each Plant-Type monster currently in your Graveyard, until the end of this turn. During the End Phase, destroy all Plant-Type monsters you control.
It's meant to be a burst finisher for plant decks, possibly after special summoning one or two of them. Just 3 plants in your graveyard is an extra 900 damage, which definitely should not be taken lightly, even if you only have one monster.
Its trash that anybody with at least a half working brain should avoid. Low boost without setup(which requires tremendous effort) with an unnecessary side effect means its shit. This is NOT Limiter Removal. You might as well run Reinforcement or Rising Energy if you want an attack booster
Kind of a useless card for plant decks. It drstroys your own monsters at the end of your turn.