Ukkon, Horde Scientist

Other humans you control are insects in addition
to their other types.
{t}, Sacrifice another insect: Create two 1/1 black
Drone creature tokens.
{t}, Sacrifice three other insects: Create a 4/4
black Corpser creature token with Flanking.
{t}, Sacrifice five other insects: Create a 6/6
black Brumak creature token with trample and
Menace.