Contested War Zone

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: Until end of turn, this land becomes a 2/3 Construct artifact creature. It's still a land. ( can be paid with one mana from a snow source.)

Whenever this land deals combat damage to a creature, tap that creature and it doesn't untap during its controller's next untap step.

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: This land deals 1 damage to target attacking creature. Activate only during the end of combat step.

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, : Creatures you control gain deathtouch and lifelink until end of turn.

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: Untap target attacking creature with shadow. Prevent all combat damage that would be dealt to and dealt by that creature this turn.

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, Sacrifice this land: Target attacking creature without flying gets -1/-2 until end of turn.

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: This land becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land.

, : Target attacking Assembly-Worker gets +2/+2 until end of turn.