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'Add {R} for each tapped land your opponents control.
'When Mana Conference enters the battlefield, each player secretly chooses a basic land type, then those choices are revealed. Mana Conference gains each basic land type that received at least...
'This artifact doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact. At the beginning of your draw...
'Add {R} for each tapped land your opponents control.
'Haste
This creature can't block.
'Whenever a creature enters, you may add an amount of {C} equal to the number of creatures you control that share a creature type with it.
'This artifact doesn't untap during your untap step. At the beginning of your upkeep, you may pay {4}. If you do, untap this artifact. At the beginning of your draw...
'Tap all lands target player controls and that player loses all unspent mana.
Add {R} for each tapped land your opponents control.
'Each enchantment deals 2 damage to its controller, then each Aura attached to a creature deals 2 damage to the creature it's attached to.
'Tap all lands target player controls and that player loses all unspent mana.
'Menace
Whenever one or more opponents are dealt noncombat damage, creatures you control get +1/+0 until end of turn.