Once exerted, that ability cant be used again that turn
In Shimmering Skies, the realm of Lorcana holds a great festival to celebrate its recent victory over Ursula, achieved in the previous set, Ursulas Return
What if the Battle is Defeated on an Opponents Turn
You ramp using a critical mass of mana dorks (creatures that tap for mana) like Llanowar Elves, Priest of Titania, and Elvish Archdruid, which tap for more mana the more elves you control
I wouldn't miss the opportunity to put this mechanic in your deck, even if just on one creature
Card Set(s) -The Three Brothers-[ST13] CARD VIEW ST13-013 | SR | CHARACTER Monkey.D.Garp Attribute Strike Block icon 2 Effect [On Play] Look at 5 cards from the top of your deck