Urza's Tower (Plains) [Antiquities] Basic Lightning Energy including dozens of Trainer cards

including dozens of Trainer cards and 2 copies of Crobat V

While you have no monsters in your Graveyard

choose 1 of them and put it on his or her Bench

you must remove from play 1 Rock-Type monster from

Rarity: P Card Type: Instant Description: As an additional cost to play Fling

Urza's Tower (Plains) [Antiquities] Basic Lightning Energy including dozens of Trainer cardsRarity: C Card Type: Land Description: Tap to add 1 colorless mana to your mana pool. If you have Urzas Mine, Urzas Tower, and Urzas Power Plant in play at the same time, tap to add 3 colorless mana to your mana pool. Flavor: Urza always put Tocasias lessons on resource gathering to effective use.