Agrius, Awoken Fury

Other barbarians you control get +1/+1 and have
haste and trample.
You may exert Agrius, Awoken Fury as it attacks.
When you do, put four +1/+1 counters on target
land you control, untap it. It becomes a 0/0 Elemental Barbarian creature with indestructible
thats tapped and attacking. Its still a land.
{1}{g}{g}: Agrius, Awoken Fury gains vigilance
until end of turn.