Gur'thak Savage Warchief

Reduce the cost of Orcs by {3}
{b}{r}{g}{t} Sacrifice an Orc creature and deal damage
equal to its power to any target.
War-Chief (Creatures with War-Chief Challenge other creatures with War-Chief on your side of the battlefield.
The creature with the greater power and/or toughness
kills the other and gains the abilities and power and toughness of the other War-Chief)