cards like exploration mtg (retro)- Artist Proof you may cast a permanent spell from your graveyard by sacrificing a land in addition to paying its other costs. Exploration & Burgeoning | Proxy

That depends on your wants, your wallet, and what you believe is good synergy with the theme you build toward

Of course, maybe that was because people were using it to fetch the uber-broken Tolarian Academy

Paying 2 generic mana to draw one card isnt going to feel amazing, but things very quickly snowball from there

One weakness is that it does not remove the cards

We also have several other cards that search your library for artifacts like Tribute Mage, Trinket Mage, and Spellseeker

Last are plenty of creatures that flicker or return other creatures to your hand when they enter the battlefield, which means you can chain some abilities and really get things moving