Like most Magic: The Gathering cards, the value of Eager Construct depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Battlebond)
-4 You get an emblem with "Your opponents play with their hands revealed" and "Whenever an opponent draws a card, this emblem deals 1 damage to them." Loyalty : 4 Legality Vintage Legacy Premodern Modern Pioneer Standard Duel Commander Commander Multi Historic Alchemy Illus
Mind Roots Not on the lifegain theme like the above cards, but very on the Golgari Midrange theme
(It is not, however, Outpost Siege, a mistake an earlier draft made caught by an eagle-eyed commenter!) This deck, on the whole, suffers from Way-Too-Many-Tapland-Itis, and its ramp package barely mitigates that
You "discover" when you finish the process of revealing cards, exiling an appropriate nonland card, casting that card or putting it into your hand, and putting the remaining exiled cards on the bottom of your library in a random order, even if one or more of those actions were impossible for some reason
2021-09-24 If it is night, permanents with daybound that enter the battlefield without being cast will enter with their nightbound faces up