Sekmeth, War and Vengeance

At the beginning of your upkeep, you may
sacrifice another creature, if you do, Sekmeth
gains double strike until end of turn, you may
play an additional land this turn, if you can't
sacrifice a creature, Sekmeth deals damage
equal to its power to you.
{g}, sacrifice a land: Create two 0/1 white Goat
creature tokens.