Ghostly Prison

Creatures can't attack you unless their controller pays {2} for each creature they control that's attacking you.

Rhystic Study

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

As long as this artifact is untapped, players can't untap more than one land during their untap steps.

White spells you cast cost {1} less to cast.
Blue spells you cast cost {1} less to cast.
Spells your opponents cast cost {1} more to cast.

As long as this artifact is untapped, players can't untap more than two permanents during their untap steps.

Flying, lifelink
Creatures entering or dying don't cause abilities to trigger.

Each spell costs {3} more to cast except during its controller's turn.

{1}: Any player may pay {1}. If no one does, the next time a source of your choice would deal damage to you this turn, prevent that damage.