Lord Bottle Gnome the Rich

When Lord Bottle Gnome the Rich enters the battlefield return all other Gnome Lords to their owners command zone.
{s}{r/g}Sacrifice a Gnome creature: Gnomes
you control gain "{t}: Add one mana of any color"
until end of turn.
{s}{g}{c}Sacrifice a Gnome creature: Put Lord
Bottle Gnome the Rich onto the battlefield.
Activate this only from the command zone