Echoing Deeps

T: Add C. T: Add CC. Spend this mana only to cast colorless Eldrazi spells or activate abilities of colorless Eldrazi.

T: Add C. 2, T, Sacrifice a Desert: Exile all graveyards.

Indestructible T: Add C. 5, T: Add five mana in any combination of colors.

T: Add C. 3, T: Draw a card. Activate only if you control a creature with power 4 or greater.

This land enters tapped. T: Add G or W. 1GW: Until end of turn, this land becomes a 3/4 green and white Elemental creature with reach. It's still a land.

This land enters tapped. T: Add G or W. 1GW: Until end of turn, this land becomes a 3/4 green and white Elemental creature with reach. It's still a land.

At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life. T: Add C. 4, T, Sacrifice Inventors' Fair: Search your library for an artifact card, reveal it, put it into your hand, then shuffle. Activate only if you control three or more artifacts.

This land enters tapped. T: Add U or B. 1UB: Until end of turn, this land becomes a 3/2 blue and black Elemental creature. It's still a land. It can't be blocked this turn.