Wizard's Rockets enters the battlefield tapped. {X}, {T}, Sacrifice Wizard's Rockets: Add X mana in any combination of colors. When Wizard's Rockets is put into a graveyard from the battlefield, draw a card.
Look at target opponent's hand and choose a card from it. You control that player until Word of Command finishes resolving. The player plays that card if able. While doing so, the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card. If the chosen card is cast as a spell, you control the player while that spell is resolving.
Flying, trample When Worldgorger Dragon enters the battlefield, exile all other permanents you control. When Worldgorger Dragon leaves the battlefield, return the exiled cards to the battlefield under their owners' control.
Worn Powerstone enters the battlefield tapped. {T}: Add {C}{C}.
"The strange energy source isn't cosmium after all, but some unidentifiable material that has leached cosmium residue from the walls. Could be dangerous. Could change everything." —Oltec archaeological survey
When Wrath of Marit Lage enters the battlefield, tap all red creatures. Red creatures don't untap during their controllers' untap steps.
"Marit Lage lies frozen in a glacier's heart. Still her dreams take form in our world, stealing the heat from our souls." —Halvor Arenson, Kjeldoran priest
You get X {E}, then you may pay any amount of {E}. Destroy each artifact, creature, and enchantment with mana value less than or equal to the amount of {E} paid this way.