Sewer Goat Rider

When Sewer Goat Rider enters the battlefield
create a 0/1 white goat creature token.
Goats you control get +2/+1
Tap an untapped Goat you control: Sewer Goat
Rider gains Trample until end of turn.
Tap an untapped Goat you control: Sewer Goat
Rider gets +x/+x, until end of turn, where x is
that goats toughness.