Mortoa, Lord of The Forest

Indestructible, Defender, Deathtouch.
When Mortoa, Lord of The Forest enters the
battlefield untap all lands you control.
{x}{g}{g}{t}, Target creature gets +X/+X until end of
turn where X is the number of lands you control
{g}{g}{g}{g}{g}{g}, X creatures gain trample where X is
the number of lands you control.