Gift of The Black Goat

As an additional cost to cast Gift of The Black
Goat pay 6 life. Then place two 3/3 Dark Young
tokens with trample onto the battlefield.
{t}{x} Where X is one mana for every pair of power
and toughness you remove from creatures you
control. For every three pairs you remove, place a
3/3 Dark Young token with trample onto the battlefield.