Like most Magic: The Gathering cards, the value of Entomb 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 (Amonkhet Invocations)
(2015-08-25) If the non-awaken part of the spell requires a target, you must choose a legal target
And it can be so much more with cards like Lingering Souls, or expensive fliers you wouldn't mind getting down for a mana cheaper
Summary Donald Duck's valuable cards include Musketeer ($0.13), Lively Pirate ($0.19), and Musketeer Soldier ($0.26)
Decide early on how you wish to deal with symbols and foreign languages
guess dragons are flying lizards after all!)