This is because whenever a land enters the battlefield under your control, each of your creatures are untapped and you gain an additional combat step
See the Truth, when cast from your plot, gets you three cards
This is a nice Common that generates tons of value, even if it does eventually sacrifice itself
In the end, the straight-out-of-the-box Abzan Keyword deck feels like it should have some really powerful games when it draws the right cards early but will also have some really bad games where it is unable to fill the graveyard for Kathril, Aspect Warper or gets stuck with a bunch of 8-drops in hand with no ramp
This enchantment could easily strengthen a player's board state especially when included in a blue/white deck that prioritizes casting auras and spells
A couple weeks ago, I wrote that you should take enablers higher than payoffs in Ultimate Masters