Swoat, Harbinger of the Tribe

When a land enters the battlefield, it's controller
makes two 0/1 white Goat creature tokens.
Other Goats get +1/+1.
{x}{x}{t}: Create X 0/1 white Goat creature tokens.
{3}{ut}: Create three 0/1 white Goat creature tokens.
Only your opponents can activate this ability.