Coming down for just three mana, she lets you pay that much again to salvage an artifact or enchantment from your graveyard, opening up the doors to a range of strategies, from Control to Combo
While today, we expect reprints on a yearly or even monthly basis, and much of the player base clamors for more reprints of in-demand staples, at the time, the idea of a high-supply reprint set was completely new
Has the Original Zombie Amass Been Erratta'd
Its best to play it later in the game and follow it with another elf + draw a card, or if you already have a good board to attack, otherwise you probably wont untap with it
For example, many recent statistical analyses of mana bases, such as Frank Karstens article, assume a large value for (1), as a matter of practicality