Cavernous Maw Djinn create a 1/1 colorless Servo

create a 1/1 colorless Servo artifact creature token

Return a land you control to its owner's hand: Create a 1/1 blue Illusion creature token with flying

Shacklegeist can block only creatures with flying

you may return that card to the battlefield under your control

Each player loses life equal to the number of creatures they controlled that were destroyed this way

Cavernous Maw Djinn create a 1/1 colorless Servo{T}: Add {C}. {2}: Cavernous Maw becomes a 3 3 Elemental creature until end of turn. It's still a Cave land. Activate only if the number of other Caves you control plus the number of Cave cards in your graveyard is three or greater.