Prahv, Spires of Order

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, : Prevent all combat damage that would be dealt by target attacking creature this 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.

: Add . This land deals 2 damage to you.

Whenever a creature deals combat damage to you, that creature's controller gains control of this land.

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, : Attacking creatures get +1/+0 until end of turn.

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, , Sacrifice this land: It deals 4 damage to target creature. ( can be paid with one mana from a snow source.)

, Sacrifice this artifact: The next time a source of your choice would deal damage to you this turn, prevent half that damage, rounded down.