Well, taking in mind that my MLP deck made based on your cards is designed to gain an insane ammount of lives (Fluttershy, Derpy and Element of Kindness) 4 lives is a reasonable cost and I have plenty of chances of getting it back.
Three details: (A) The effect is cool (two lands into play and not limited to basing lands), but it's way costly. When you rely on land-searchers (and I do, considering that I've been playing Prismatic decks since Apocalypse), you learn that you want your opening hand to have Mana-Flow, or two lands and one mana -multiplier cost 3 or less (a mana elf, mana Myr, mana artifact or some land searching Instant or Sorcery). And even a cost 3 is a gamble, as you cannot warranty that you will draw a third land before your third turn. By the time you can pay a cost 5, your deck should already be running smoothly and your objectives should have already shifted toward your higher strategies. That's why people would use "Reap And Sow": it's expensive, but it pays to keep it in hand until somebody plays some funky land. In the case of your card, I would recommend you to duplicate Kodama's Reach, then add a Cost 2 kicker to allow to search for non-basic lands. Ultimate craziness would be a cheap sorcery with a Cost 1 multikicker, though...
(B) Paying a cost 2G+3 could be difficult unless your deck has no more than two colours.
(C) You forgot to add "...then shuffle your library." Otherwise, you can use this effect as an Infinite Scry (such as a creatureless deck that was full of cards saying 'reveal cards until you reaveal an X-creature...').