If you really need cards that bring lands back from the graveyard, and an effect like Crucible of Worlds is not good enough, this is an ok way to do that
The green land is slightly more relevant as Academy has been banned in virtually every format, but both are exceptional ramp pieces
For more, check out Planeswalkers Guide to Ikoria
The cost is nice and low, but the exhaust ability will simply destroy some libraries with little extra work
There are plenty of ways to get even more out of a card like PuPu UFO, especially with abilities that untap a card, allowing you to triple the amount of lands you can play in a single turn for devastating effects
Beginning of Combat step Before you get to fighting directly, all players can choose to use instant abilities and effects - these might include attempts to tap creatures or otherwise weaken your opponent or strengthen yourself