Plantern

Defender.
{t},{w}: Target creature you control is able to
attack a creature directly.
{t},{b}: Untap target creature.

Plantern defies science. He just does. Other plants eat
light and excrete oxygen; Plantern eats darkness and
excretes light. Plantern's cagey about how he does it.
"I'm not gonna say 'sorcery,' I wouldn't use the term
'dark forces,' I just... I think I've said enough."