If one of them resolves, it will remain in effect until the game ends, Tenth District Hero leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first
These can include: Enough material for each standard card typecharacters, creatures, objects, locations, events, etc
There is absolutely nothing wrong with good old basic lands, but decks these days have more incentive and ability than ever to play a wide variety of colors off an even wider variety of mana sources
Wasitora is the kind of deep cut that I appreciate being put into the game and I really think a creative budget deck is very possible, but very similar to O-Kagachi, a strategy never really surfaced in any meaningful way