If you really dont want your opponent to have Urza's Tower, or Nykthos, Shrine to Nyx, or Phyrexian Tower, heres a way to get them gone for good
$0.49 Bartz and Boko Final Fantasy $0.49 Raubahn, Bull of Ala Mhigo Final Fantasy $0.49 Zell Dincht Final Fantasy $0.49 Summoner's Grimoire Final Fantasy $0.49 Jill, Shiva's Dominant Final Fantasy $0.49 Sazh Katzroy Final Fantasy $0.69 Firion, Wild Rose Warrior Final Fantasy $0.99 Squall, SeeD Mercenary Final Fantasy $0.99 Excalibur II Final Fantasy $0.49 Gilgamesh, Master-at-Arms Final Fantasy $0.99 Kuja, Genome Sorcerer Final Fantasy $0.49 Summon: G.F
Gau, Feral Youth* Final Fantasy 6 s wild boy, is a bear (a 2/2 for 2) getting in early and growing, while also taking advantage of Final Fantasy 6 s Revival Trance Commander Deck's focus on graveyard antics to get even more damage in
Both are decent cards but both are not decent cards for just three mana