Cost reducers have a lower floor than other ramp sources because of their restrictions but a higher ceiling since they can enable explosive turns
In the context of the card, it appears to be wordplay on the fact that the word "present" can refer to a gift you give to someone (in which case, it's pronounced like "pleasant") or the act of showing something off (in which case, it's pronounced like "prevent"), and the effect appears to be using both meanings at the same time
It only has a few appearances on the banned and restricted list which include Chatterstorm, Empty the Warrens, and Grapeshot while Mind's Desire is restricted in Vintage
Its used in some red prison decks that use planeswalker cards like Chandra, Torch of Defiance that generates mana to rebuild faster or fast mana sources like Chrome Mox
Riverchurn Monument (one of Aetherdrift's better offerings) is a good alternative to a "mill half your library effect" and can easily pull wins out of games that seem hopeless
Inevitable Defeat Have a problem