4 Eternal Witness Eternal Witness, and its older sibling, Timeless Witness, can return any card from your graveyard to your hand
Being a forest (and a useful land type) specifically makes it fetchable, while being a creature means it's a prime target for Green Sun's Zenith and other creature tutors
If they are rare enough to be worth 25k, we kinda doubt it
(Damage and effects that say "destroy" don't destroy them.) Company: Wizards of the Coast Series: Oath of the Gatewatch Item Type: Single Card Brand: Magic The Gathering Release Date: January 2016 UPC: Stock #: 113770 Our Guarantees to You, Our Valued Customer
Added Tim and Anders Wilson, Caretakers
Now that Fires of Invention is banned, there wont really be this sort of mana-multiplying enchantment available unless something analogous is printed in Zendikar Rising