Swarmyard

This land enters tapped. T: Add R or W. 2RW: Until end of turn, this land becomes a 2/1 red and white Elemental creature with double strike. It's still a land.

Hexproof This land enters tapped. When this land enters, sacrifice two lands. T: Add three mana of any one color.

T: Add C. 1, T: Move a counter from target permanent you control onto a second target permanent. Activate only as a sorcery.

This land enters with a charge counter on it. T: Add C. XX, T: Put X charge counters on this land. 3, T, Sacrifice this land: Destroy each nonland permanent with mana value equal to the number of charge counters on this land.

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

You may have this land enter tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types. T: Add C.

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

This land enters tapped. T: Add R or G. 2RG: Until end of turn, this land becomes a 3/3 red and green Elemental creature with "Whenever this creature attacks, put a +1/+1 counter on it." It's still a land.