When this enchantment enters, if it's on the battlefield, it becomes an Aura with "enchant creature put onto the battlefield with Necromancy." Put target creature card from a graveyard onto the battlefield under your control and attach this enchantment to it
While Im okay with the latter if it comes down to it, I do tend to find that its not uncommon for this to trigger again and again, allowing you to put lands onto the battlefield against players who are ramping aggressively - You can even pair this card with Weathered Wayfarer to always find your best lands and put them directly into play
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It can change its creature type every turn, which is great if your deck cares about more than one type of creature
It's very powerful in every place that you can think of to run it in, and it has two tribal synergies too, by the by