Exploration [Urza's Saga] Urza's Legacy tap all untapped creatures that

tap all untapped creatures that share a creature type with it or untap all tapped creatures that share a creature type with it

When Darksteel Reactor has twenty or more charge counters on it

Set: Dominaria Promos Type: Legendary Creature — Human Artificer Mythic Cost: {2}{U}{R} Whenever you cast a historic spell

You may put that card on the bottom of that player's library

Set: Magic Player Rewards 2008 Type: Sorcery Rare Cost: {U} Look at the top three cards of your library

Exploration [Urza's Saga] Urza's Legacy tap all untapped creatures thatSet: Urza's Saga Type: Enchantment Rare Cost: {G} You may play an additional land on each of your turns. The first explorers found Argoth a storehouse of natural wealthtowering forests grown over rich veins of ore.