The Ancient Herald

Indestructible, lifelink, protection from black
and green, flying, hexproof
The Ancient Herald costs X more mana where X
is 8 minus the number of gates you control.
When The Ancient Herald enters the battlefield
support a number of creatures equal to the
number of gates you control.
As long as The Ancient Herald is on the
battlefield, all other black and green creatures on
the battlefield gain +3, +3 and hexproof.