It's an answer to answers - commonly run in decks to answer removal that's targeted like Swords to Plowshares or Beast Within or mass like Blasphemous Act or Damnation
Oh, and it's a 5/5 creature that comes back after it dies
I enjoy looking through old cards and finding new options for EDH decks
Diamond Weapon Diamond Weapon is a surprising legendary, but should often cost closer to 5 or 6 mana for a beefy 8/8 reach immune to combat damage hampered only by a lack of trample
Gothmog, Morgul Lieutenant Outside of amass decks, Gothmog, Morgul Lieutenants utility is as a deathtouch enabler thats easy on your wallet
This can leave your foes feeling like they cannot do anything to stop it, and, unlike something like Kira, which only protects your stuff from the first thing to target them