https://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=1717

Necropolis 5
Artifact Creature - Wall
Defender
Exile a creature card from your graveyard: Put X +0/+1 counters on Necropolis, where X is the exiled card's converted mana cost.
0/1

This card has a neat effect that would be fun to play with, if it didn't cost five mana. The ability requires a bit of set-up. You either want a graveyard full of many small creatures, or a couple of big ones, and no better payoff for having those creatures in your graveyard than this. The effect simply isn't powerful enough to build a deck around and the high mana cost makes it hard to just try anyway. While they may be some fun things to try with cards like About Face and Proper Burial, this Wall is more flavor than function.