Cards like these, that let you play as many copies as you want in a deck, are often worth a couple bucks even when printed at common or uncommon
The absurd amount of card advantage that Necro offers, essentially allowing you to convert life into cards, makes it one of the strongest card-draw spells that has ever been made
This is a great way to have yourself a core of reliable favorites, and maybe match that quantity with the same again of rotating slots
Turn it face up any time for its mana cost if it's a creature card.) Whenever a creature you control but don't own dies, its owner loses 2 life and you gain 2 life
I can see a lot of people making a joke deck out of this one
Amzu, Swarms Hunger seems like a nifty new Insect typal commander