I love it in ramp to win the game and make your other big stuff trample, madness, discard matters, Golgari self-mill, Jund's Lord Windgrace lands return to the battlefield from the graveyard, Sultai's self-milling Sidisi, Brood Tyrant, blink, midrange, tokens, and loads more
Board wipes are conventionally used to describe mass creature removal
My first thought for how to abuse a mana dork like Jegantha, the Wellspring would be to run ways to untap her that will allow you to go infinite, but those generally all involve paying generic mana costs
Here are the deck lists for the two starter decks in Ursula's Return
Creature - Warrior Giant Ranger Color tag templates(None) Militia's Pride Whenever a nontoken creature you control attacks, you may pay
Pauper : Pauper is a hyper-competitive format where you can only use commonsthe least rare cards in Magic