Boarbruck Earthclaw

Tunneling (This creature may tunnel under opponent's creatures on the battlefield. On the combat phase you declare a tunnel attack, tap this creature, and put a tunneling token on it. It stays tapped until the attack phase of your next turn, and then it does damage directly to target player.)
{g}: Pair Boarbruck Earthclaw with target gnome. Their power and toughness are equal to their combined power and toughness.
{g}{g}: If Boarbruck Earthclaw and paired gnome were to be destroyed, sacrifice Boa